Add ESLint plugin for ES API linting

Adding [eslint-plugin-compat](https://github.com/amilajack/eslint-plugin-compat) to check for usage of incompatible APIs.

For a list of browsers, we start out using both the 'defaults' query along with IE 11, which is still expressly supported in OSD v4 (current).

.browserslistrc

@@ -0,0 +1 @@
+defaults, IE 11

.eslintrc.json

@@ -1,7 +1,9 @@
 {
     "root": true,
+    "plugins": ["compat"],
     "extends": [
-        "eslint:recommended"
+        "eslint:recommended",
+        "plugin:compat/recommended"
     ],
     "env": {
         "es6": false,

package-lock.json

@@ -9,6 +9,7 @@
             "version": "4.0.0",
             "license": "BSD-3-Clause",
             "devDependencies": {
+                "eslint-plugin-compat": "^4.1.2",
                 "grunt": "^1.6.1",
                 "grunt-contrib-clean": "^2.0.1",
                 "grunt-contrib-compress": "^2.0.0",
@@ -122,6 +123,12 @@
             "dev": true,
             "license": "BSD-3-Clause"
         },
+        "node_modules/@mdn/browser-compat-data": {
+            "version": "5.2.36",
+            "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-5.2.36.tgz",
+            "integrity": "sha512-cS+xbp4jq+W04pFqw5639Grzj82JevJZst4b55Mk2NGc9wY7uXD6hlM6H0hkK5mLKXXZKsT1xq79W6LsSG4crw==",
+            "dev": true
+        },
         "node_modules/@types/node": {
             "version": "18.11.9",
             "dev": true,
@@ -416,6 +423,21 @@
                 "node": ">=0.10.0"
             }
         },
+        "node_modules/ast-metadata-inferer": {
+            "version": "0.7.0",
+            "resolved": "https://registry.npmjs.org/ast-metadata-inferer/-/ast-metadata-inferer-0.7.0.tgz",
+            "integrity": "sha512-OkMLzd8xelb3gmnp6ToFvvsHLtS6CbagTkFQvQ+ZYFe3/AIl9iKikNR9G7pY3GfOR/2Xc222hwBjzI7HLkE76Q==",
+            "dev": true,
+            "dependencies": {
+                "@mdn/browser-compat-data": "^3.3.14"
+            }
+        },
+        "node_modules/ast-metadata-inferer/node_modules/@mdn/browser-compat-data": {
+            "version": "3.3.14",
+            "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-3.3.14.tgz",
+            "integrity": "sha512-n2RC9d6XatVbWFdHLimzzUJxJ1KY8LdjqrW6YvGPiRmsHkhOUx74/Ct10x5Yo7bC/Jvqx7cDEW8IMPv/+vwEzA==",
+            "dev": true
+        },
         "node_modules/async": {
             "version": "1.5.2",
             "dev": true,
@@ -633,6 +655,34 @@
                 "node": ">=0.10.0"
             }
         },
+        "node_modules/browserslist": {
+            "version": "4.21.5",
+            "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.21.5.tgz",
+            "integrity": "sha512-tUkiguQGW7S3IhB7N+c2MV/HZPSCPAAiYBZXLsBhFB/PCy6ZKKsZrmBayHV9fdGV/ARIfJ14NkxKzRDjvp7L6w==",
+            "dev": true,
+            "funding": [
+                {
+                    "type": "opencollective",
+                    "url": "https://opencollective.com/browserslist"
+                },
+                {
+                    "type": "tidelift",
+                    "url": "https://tidelift.com/funding/github/npm/browserslist"
+                }
+            ],
+            "dependencies": {
+                "caniuse-lite": "^1.0.30001449",
+                "electron-to-chromium": "^1.4.284",
+                "node-releases": "^2.0.8",
+                "update-browserslist-db": "^1.0.10"
+            },
+            "bin": {
+                "browserslist": "cli.js"
+            },
+            "engines": {
+                "node": "^6 || ^7 || ^8 || ^9 || ^10 || ^11 || ^12 || >=13.7"
+            }
+        },
         "node_modules/buffer": {
             "version": "5.7.1",
             "dev": true,
@@ -716,6 +766,22 @@
                 "node": ">=6"
             }
         },
+        "node_modules/caniuse-lite": {
+            "version": "1.0.30001456",
+            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001456.tgz",
+            "integrity": "sha512-XFHJY5dUgmpMV25UqaD4kVq2LsiaU5rS8fb0f17pCoXQiQslzmFgnfOxfvo1bTpTqf7dwG/N/05CnLCnOEKmzA==",
+            "dev": true,
+            "funding": [
+                {
+                    "type": "opencollective",
+                    "url": "https://opencollective.com/browserslist"
+                },
+                {
+                    "type": "tidelift",
+                    "url": "https://tidelift.com/funding/github/npm/caniuse-lite"
+                }
+            ]
+        },
         "node_modules/chalk": {
             "version": "2.4.2",
             "dev": true,
@@ -1162,6 +1228,12 @@
             "dev": true,
             "license": "MIT"
         },
+        "node_modules/electron-to-chromium": {
+            "version": "1.4.302",
+            "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.302.tgz",
+            "integrity": "sha512-Uk7C+7aPBryUR1Fwvk9VmipBcN9fVsqBO57jV2ZjTm+IZ6BMNqu7EDVEg2HxCNufk6QcWlFsBkhQyQroB2VWKw==",
+            "dev": true
+        },
         "node_modules/encodeurl": {
             "version": "1.0.2",
             "dev": true,
@@ -1201,6 +1273,15 @@
                 "string-template": "~0.2.1"
             }
         },
+        "node_modules/escalade": {
+            "version": "3.1.1",
+            "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
+            "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
+            "dev": true,
+            "engines": {
+                "node": ">=6"
+            }
+        },
         "node_modules/escape-html": {
             "version": "1.0.3",
             "dev": true,
@@ -1365,6 +1446,88 @@
                 "url": "https://opencollective.com/eslint"
             }
         },
+        "node_modules/eslint-plugin-compat": {
+            "version": "4.1.2",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-compat/-/eslint-plugin-compat-4.1.2.tgz",
+            "integrity": "sha512-DNrQgDi5L4mAL4FdFboKBlSRg6MWfd75eA7K91lMjtP5ryN+O11qT2FDn7Z6zqy6sZ4sJawUR5V75qzB6l0CBg==",
+            "dev": true,
+            "dependencies": {
+                "@mdn/browser-compat-data": "^5.2.34",
+                "ast-metadata-inferer": "^0.7.0",
+                "browserslist": "^4.21.5",
+                "caniuse-lite": "^1.0.30001451",
+                "find-up": "^5.0.0",
+                "lodash.memoize": "4.1.2",
+                "semver": "7.3.8"
+            },
+            "engines": {
+                "node": ">=16.x"
+            },
+            "peerDependencies": {
+                "eslint": "^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0"
+            }
+        },
+        "node_modules/eslint-plugin-compat/node_modules/find-up": {
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/find-up/-/find-up-5.0.0.tgz",
+            "integrity": "sha512-78/PXT1wlLLDgTzDs7sjq9hzz0vXD+zn+7wypEe4fXQxCmdmqfGsEPQxmiCSQI3ajFV91bVSsvNtrJRiW6nGng==",
+            "dev": true,
+            "dependencies": {
+                "locate-path": "^6.0.0",
+                "path-exists": "^4.0.0"
+            },
+            "engines": {
+                "node": ">=10"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
+        "node_modules/eslint-plugin-compat/node_modules/locate-path": {
+            "version": "6.0.0",
+            "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
+            "integrity": "sha512-iPZK6eYjbxRu3uB4/WZ3EsEIMJFMqAoopl3R+zuq0UjcAm/MO6KCweDgPfP3elTztoKP3KtnVHxTn2NHBSDVUw==",
+            "dev": true,
+            "dependencies": {
+                "p-locate": "^5.0.0"
+            },
+            "engines": {
+                "node": ">=10"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
+        "node_modules/eslint-plugin-compat/node_modules/p-limit": {
+            "version": "3.1.0",
+            "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
+            "integrity": "sha512-TYOanM3wGwNGsZN2cVTYPArw454xnXj5qmWF1bEoAc4+cU/ol7GVh7odevjp1FNHduHc3KZMcFduxU5Xc6uJRQ==",
+            "dev": true,
+            "dependencies": {
+                "yocto-queue": "^0.1.0"
+            },
+            "engines": {
+                "node": ">=10"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
+        "node_modules/eslint-plugin-compat/node_modules/p-locate": {
+            "version": "5.0.0",
+            "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-5.0.0.tgz",
+            "integrity": "sha512-LaNjtRWUBY++zB5nE/NwcaoMylSPk+S+ZHNB1TzdbMJMny6dynpAGt7X/tl/QYq3TIeE6nxHppbo2LGymrG5Pw==",
+            "dev": true,
+            "dependencies": {
+                "p-limit": "^3.0.2"
+            },
+            "engines": {
+                "node": ">=10"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/eslint-scope": {
             "version": "7.1.0",
             "dev": true,
@@ -3975,6 +4138,12 @@
             "dev": true,
             "license": "MIT"
         },
+        "node_modules/lodash.memoize": {
+            "version": "4.1.2",
+            "resolved": "https://registry.npmjs.org/lodash.memoize/-/lodash.memoize-4.1.2.tgz",
+            "integrity": "sha512-t7j+NzmgnQzTAYXcsHYLgimltOV1MXHtlOWf6GjL9Kj8GK5FInw5JotxvbOs+IvV1/Dzo04/fCGfLVs7aXb4Ag==",
+            "dev": true
+        },
         "node_modules/lodash.merge": {
             "version": "4.6.2",
             "dev": true,
@@ -4345,6 +4514,12 @@
                 "node": ">=0.12.0"
             }
         },
+        "node_modules/node-releases": {
+            "version": "2.0.10",
+            "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.10.tgz",
+            "integrity": "sha512-5GFldHPXVG/YZmFzJvKK2zDSzPKhEp0+ZR5SVaoSag9fsL5YgHbUHDfnG5494ISANDcK4KwPXAx2xqVEydmd7w==",
+            "dev": true
+        },
         "node_modules/nopt": {
             "version": "3.0.6",
             "dev": true,
@@ -4784,6 +4959,12 @@
             "dev": true,
             "license": "MIT"
         },
+        "node_modules/picocolors": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+            "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
+            "dev": true
+        },
         "node_modules/picomatch": {
             "version": "2.3.1",
             "dev": true,
@@ -5617,9 +5798,10 @@
             "dev": true
         },
         "node_modules/semver": {
-            "version": "7.3.5",
+            "version": "7.3.8",
+            "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.8.tgz",
+            "integrity": "sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==",
             "dev": true,
-            "license": "ISC",
             "dependencies": {
                 "lru-cache": "^6.0.0"
             },
@@ -6349,6 +6531,32 @@
                 "node": ">=0.10.0"
             }
         },
+        "node_modules/update-browserslist-db": {
+            "version": "1.0.10",
+            "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.10.tgz",
+            "integrity": "sha512-OztqDenkfFkbSG+tRxBeAnCVPckDBcvibKd35yDONx6OU8N7sqgwc7rCbkJ/WcYtVRZ4ba68d6byhC21GFh7sQ==",
+            "dev": true,
+            "funding": [
+                {
+                    "type": "opencollective",
+                    "url": "https://opencollective.com/browserslist"
+                },
+                {
+                    "type": "tidelift",
+                    "url": "https://tidelift.com/funding/github/npm/browserslist"
+                }
+            ],
+            "dependencies": {
+                "escalade": "^3.1.1",
+                "picocolors": "^1.0.0"
+            },
+            "bin": {
+                "browserslist-lint": "cli.js"
+            },
+            "peerDependencies": {
+                "browserslist": ">= 4.21.0"
+            }
+        },
         "node_modules/uri-js": {
             "version": "4.4.1",
             "dev": true,
@@ -6555,6 +6763,18 @@
                 "fd-slicer": "~1.1.0"
             }
         },
+        "node_modules/yocto-queue": {
+            "version": "0.1.0",
+            "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+            "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+            "dev": true,
+            "engines": {
+                "node": ">=10"
+            },
+            "funding": {
+                "url": "https://github.com/sponsors/sindresorhus"
+            }
+        },
         "node_modules/zip-stream": {
             "version": "4.1.0",
             "dev": true,
@@ -6648,6 +6868,12 @@
             "version": "1.2.1",
             "dev": true
         },
+        "@mdn/browser-compat-data": {
+            "version": "5.2.36",
+            "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-5.2.36.tgz",
+            "integrity": "sha512-cS+xbp4jq+W04pFqw5639Grzj82JevJZst4b55Mk2NGc9wY7uXD6hlM6H0hkK5mLKXXZKsT1xq79W6LsSG4crw==",
+            "dev": true
+        },
         "@types/node": {
             "version": "18.11.9",
             "dev": true,
@@ -6845,6 +7071,23 @@
             "version": "1.0.0",
             "dev": true
         },
+        "ast-metadata-inferer": {
+            "version": "0.7.0",
+            "resolved": "https://registry.npmjs.org/ast-metadata-inferer/-/ast-metadata-inferer-0.7.0.tgz",
+            "integrity": "sha512-OkMLzd8xelb3gmnp6ToFvvsHLtS6CbagTkFQvQ+ZYFe3/AIl9iKikNR9G7pY3GfOR/2Xc222hwBjzI7HLkE76Q==",
+            "dev": true,
+            "requires": {
+                "@mdn/browser-compat-data": "^3.3.14"
+            },
+            "dependencies": {
+                "@mdn/browser-compat-data": {
+                    "version": "3.3.14",
+                    "resolved": "https://registry.npmjs.org/@mdn/browser-compat-data/-/browser-compat-data-3.3.14.tgz",
+                    "integrity": "sha512-n2RC9d6XatVbWFdHLimzzUJxJ1KY8LdjqrW6YvGPiRmsHkhOUx74/Ct10x5Yo7bC/Jvqx7cDEW8IMPv/+vwEzA==",
+                    "dev": true
+                }
+            }
+        },
         "async": {
             "version": "1.5.2",
             "dev": true
@@ -6992,6 +7235,18 @@
                 "repeat-element": "^1.1.2"
             }
         },
+        "browserslist": {
+            "version": "4.21.5",
+            "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.21.5.tgz",
+            "integrity": "sha512-tUkiguQGW7S3IhB7N+c2MV/HZPSCPAAiYBZXLsBhFB/PCy6ZKKsZrmBayHV9fdGV/ARIfJ14NkxKzRDjvp7L6w==",
+            "dev": true,
+            "requires": {
+                "caniuse-lite": "^1.0.30001449",
+                "electron-to-chromium": "^1.4.284",
+                "node-releases": "^2.0.8",
+                "update-browserslist-db": "^1.0.10"
+            }
+        },
         "buffer": {
             "version": "5.7.1",
             "dev": true,
@@ -7043,6 +7298,12 @@
             "version": "3.1.0",
             "dev": true
         },
+        "caniuse-lite": {
+            "version": "1.0.30001456",
+            "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001456.tgz",
+            "integrity": "sha512-XFHJY5dUgmpMV25UqaD4kVq2LsiaU5rS8fb0f17pCoXQiQslzmFgnfOxfvo1bTpTqf7dwG/N/05CnLCnOEKmzA==",
+            "dev": true
+        },
         "chalk": {
             "version": "2.4.2",
             "dev": true,
@@ -7356,6 +7617,12 @@
             "version": "1.1.1",
             "dev": true
         },
+        "electron-to-chromium": {
+            "version": "1.4.302",
+            "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.302.tgz",
+            "integrity": "sha512-Uk7C+7aPBryUR1Fwvk9VmipBcN9fVsqBO57jV2ZjTm+IZ6BMNqu7EDVEg2HxCNufk6QcWlFsBkhQyQroB2VWKw==",
+            "dev": true
+        },
         "encodeurl": {
             "version": "1.0.2",
             "dev": true
@@ -7385,6 +7652,12 @@
                 "string-template": "~0.2.1"
             }
         },
+        "escalade": {
+            "version": "3.1.1",
+            "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.1.tgz",
+            "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==",
+            "dev": true
+        },
         "escape-html": {
             "version": "1.0.3",
             "dev": true
@@ -7573,6 +7846,60 @@
                 }
             }
         },
+        "eslint-plugin-compat": {
+            "version": "4.1.2",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-compat/-/eslint-plugin-compat-4.1.2.tgz",
+            "integrity": "sha512-DNrQgDi5L4mAL4FdFboKBlSRg6MWfd75eA7K91lMjtP5ryN+O11qT2FDn7Z6zqy6sZ4sJawUR5V75qzB6l0CBg==",
+            "dev": true,
+            "requires": {
+                "@mdn/browser-compat-data": "^5.2.34",
+                "ast-metadata-inferer": "^0.7.0",
+                "browserslist": "^4.21.5",
+                "caniuse-lite": "^1.0.30001451",
+                "find-up": "^5.0.0",
+                "lodash.memoize": "4.1.2",
+                "semver": "7.3.8"
+            },
+            "dependencies": {
+                "find-up": {
+                    "version": "5.0.0",
+                    "resolved": "https://registry.npmjs.org/find-up/-/find-up-5.0.0.tgz",
+                    "integrity": "sha512-78/PXT1wlLLDgTzDs7sjq9hzz0vXD+zn+7wypEe4fXQxCmdmqfGsEPQxmiCSQI3ajFV91bVSsvNtrJRiW6nGng==",
+                    "dev": true,
+                    "requires": {
+                        "locate-path": "^6.0.0",
+                        "path-exists": "^4.0.0"
+                    }
+                },
+                "locate-path": {
+                    "version": "6.0.0",
+                    "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-6.0.0.tgz",
+                    "integrity": "sha512-iPZK6eYjbxRu3uB4/WZ3EsEIMJFMqAoopl3R+zuq0UjcAm/MO6KCweDgPfP3elTztoKP3KtnVHxTn2NHBSDVUw==",
+                    "dev": true,
+                    "requires": {
+                        "p-locate": "^5.0.0"
+                    }
+                },
+                "p-limit": {
+                    "version": "3.1.0",
+                    "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
+                    "integrity": "sha512-TYOanM3wGwNGsZN2cVTYPArw454xnXj5qmWF1bEoAc4+cU/ol7GVh7odevjp1FNHduHc3KZMcFduxU5Xc6uJRQ==",
+                    "dev": true,
+                    "requires": {
+                        "yocto-queue": "^0.1.0"
+                    }
+                },
+                "p-locate": {
+                    "version": "5.0.0",
+                    "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-5.0.0.tgz",
+                    "integrity": "sha512-LaNjtRWUBY++zB5nE/NwcaoMylSPk+S+ZHNB1TzdbMJMny6dynpAGt7X/tl/QYq3TIeE6nxHppbo2LGymrG5Pw==",
+                    "dev": true,
+                    "requires": {
+                        "p-limit": "^3.0.2"
+                    }
+                }
+            }
+        },
         "eslint-scope": {
             "version": "7.1.0",
             "dev": true,
@@ -9227,6 +9554,12 @@
             "version": "4.0.6",
             "dev": true
         },
+        "lodash.memoize": {
+            "version": "4.1.2",
+            "resolved": "https://registry.npmjs.org/lodash.memoize/-/lodash.memoize-4.1.2.tgz",
+            "integrity": "sha512-t7j+NzmgnQzTAYXcsHYLgimltOV1MXHtlOWf6GjL9Kj8GK5FInw5JotxvbOs+IvV1/Dzo04/fCGfLVs7aXb4Ag==",
+            "dev": true
+        },
         "lodash.merge": {
             "version": "4.6.2",
             "dev": true
@@ -9478,6 +9811,12 @@
                 "websocket-stream": "^5.0.1"
             }
         },
+        "node-releases": {
+            "version": "2.0.10",
+            "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.10.tgz",
+            "integrity": "sha512-5GFldHPXVG/YZmFzJvKK2zDSzPKhEp0+ZR5SVaoSag9fsL5YgHbUHDfnG5494ISANDcK4KwPXAx2xqVEydmd7w==",
+            "dev": true
+        },
         "nopt": {
             "version": "3.0.6",
             "dev": true,
@@ -9759,6 +10098,12 @@
             "version": "1.2.0",
             "dev": true
         },
+        "picocolors": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
+            "integrity": "sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==",
+            "dev": true
+        },
         "picomatch": {
             "version": "2.3.1",
             "dev": true
@@ -10316,7 +10661,9 @@
             "dev": true
         },
         "semver": {
-            "version": "7.3.5",
+            "version": "7.3.8",
+            "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.8.tgz",
+            "integrity": "sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==",
             "dev": true,
             "requires": {
                 "lru-cache": "^6.0.0"
@@ -10828,6 +11175,16 @@
                 }
             }
         },
+        "update-browserslist-db": {
+            "version": "1.0.10",
+            "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.0.10.tgz",
+            "integrity": "sha512-OztqDenkfFkbSG+tRxBeAnCVPckDBcvibKd35yDONx6OU8N7sqgwc7rCbkJ/WcYtVRZ4ba68d6byhC21GFh7sQ==",
+            "dev": true,
+            "requires": {
+                "escalade": "^3.1.1",
+                "picocolors": "^1.0.0"
+            }
+        },
         "uri-js": {
             "version": "4.4.1",
             "dev": true,
@@ -10982,6 +11339,12 @@
                 "fd-slicer": "~1.1.0"
             }
         },
+        "yocto-queue": {
+            "version": "0.1.0",
+            "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
+            "integrity": "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==",
+            "dev": true
+        },
         "zip-stream": {
             "version": "4.1.0",
             "dev": true,

package.json

@@ -29,6 +29,7 @@
         "url": "https://github.com/openseadragon/openseadragon.git"
     },
     "devDependencies": {
+        "eslint-plugin-compat": "^4.1.2",
         "grunt": "^1.6.1",
         "grunt-contrib-clean": "^2.0.1",
         "grunt-contrib-compress": "^2.0.0",