Merge pull request #128 from stof/simplify_build_matrix

Simplified the travis build matrix

.travis.yml

@@ -7,26 +7,17 @@ php:
   - 5.6
   - hhvm
 
-env:
-  - SYMFONY_VERSION='2.2.*'
-  - SYMFONY_VERSION='2.3.*'
-  - SYMFONY_VERSION='2.4.*'
-  - SYMFONY_VERSION='2.5.*@dev'
-
 matrix:
   allow_failures:
-    - env: "SYMFONY_VERSION='2.5.*@dev'"
-    - php: hhvm
-  exclude:
-    - php: hhvm
-      env: SYMFONY_VERSION='2.2.*'
     - php: hhvm
+  include:
+    - php: 5.5
       env: SYMFONY_VERSION='2.3.*'
-    - php: hhvm
+    - php: 5.5
       env: SYMFONY_VERSION='2.5.*@dev'
 
 before_script:
-  - composer require --no-update symfony/symfony=$SYMFONY_VERSION
+  - sh -c 'if [ "$SYMFONY_VERSION" != "" ]; then composer require --no-update symfony/symfony=$SYMFONY_VERSION; fi;'
   - composer install --prefer-source
   - export PATH=./vendor/bin:$PATH