[improvement] coverage

.gitignore

@@ -21,6 +21,7 @@ _testmain.go
 *.exe
 *.test
 *.prof
+coverage.txt
 
 # IDE's files
 .idea

.travis.yml

@@ -4,8 +4,12 @@ go:
   - '1.9'
   - '1.10'
   - '1.11'
+  - '1.12'
+  - '1.13'
 before_install:
   - go get -v github.com/google/go-querystring/query
   - go get -v github.com/h2non/gock
   - cp .env.dist .env
-script: go test -v ./...
+script: go test -race -coverprofile=coverage.txt -covermode=atomic -v ./...
+after_success:
+  - bash <(curl -s https://codecov.io/bash)