Support Symfony 4.0

.travis.yml

@@ -22,9 +22,14 @@ matrix:
   include:
     - php: 7.0
       env: COMPOSER_FLAGS="--prefer-lowest"
+    - php: 7.1
+      env: SF_4="true"
 
-before_install: phpenv config-rm xdebug.ini
+before_install:
+    - phpenv config-rm xdebug.ini
+    - if [ "$SF_4" == "true" ]; then composer config minimum-stability dev; fi
+    - if [ "$SF_4" == "true" ]; then composer require symfony/symfony:4.0.* --dev --no-update; fi
 
-install: composer update $COMPOSER_FLAGS
+install: composer update $COMPOSER_FLAGS --prefer-stable
 
 script: ./phpunit

composer.json

@@ -16,21 +16,21 @@
     ],
     "require": {
         "php": "~7.0|~7.1",
-        "symfony/framework-bundle": "^2.8.18|^3.0",
-        "symfony/property-info": "^2.8|^3.0",
+        "symfony/framework-bundle": "^2.8.18|^3.0|^4.0",
+        "symfony/property-info": "^2.8|^3.0|^4.0",
         "exsyst/swagger": "~0.2.3",
         "zircote/swagger-php": "^2.0.9"
     },
     "require-dev": {
-        "symfony/twig-bundle": "^2.8|^3.0",
-        "symfony/asset": "^2.8|^3.0",
-        "symfony/console": "^2.8|^3.0",
-        "symfony/config": "^2.8|^3.0",
-        "symfony/validator": "^2.8|^3.0",
-        "symfony/property-access": "^2.8|^3.0",
-        "symfony/dom-crawler": "^2.8|^3.0",
-        "symfony/browser-kit": "^2.8|^3.0",
-        "symfony/cache": "^3.1",
+        "symfony/twig-bundle": "^2.8|^3.0|^4.0",
+        "symfony/asset": "^2.8|^3.0|^4.0",
+        "symfony/console": "^2.8|^3.0|^4.0",
+        "symfony/config": "^2.8|^3.0|^4.0",
+        "symfony/validator": "^2.8|^3.0|^4.0",
+        "symfony/property-access": "^2.8|^3.0|^4.0",
+        "symfony/dom-crawler": "^2.8|^3.0|^4.0",
+        "symfony/browser-kit": "^2.8|^3.0|^4.0",
+        "symfony/cache": "^3.1|^4.0",
         "symfony/phpunit-bridge": "^3.3",
         "sensio/framework-extra-bundle": "^3.0",
         "doctrine/annotations": "^1.2",