Merge pull request #249 from goetas/patch-1

Run tests into travis containers

.travis.yml

@@ -1,31 +1,32 @@
 language: php
+sudo: required
+dist: trusty
+group: edge
 
 cache:
   directories:
-    - $COMPOSER_CACHE_DIR
+    - $HOME/.composer/cache
 
 php:
   - 5.5
   - 5.6
   - 7.0
   - 7.1
-  - hhvm
-
-allow_failures:
-  - php: hhvm
+  - hhvm-3.9
+  - hhvm-3.12
+  - hhvm-3.15
+  - hhvm-3.18
 
+matrix:
+    fast_finish: true
 env:
   - SYMFONY_VERSION=2.4.*
   - SYMFONY_VERSION=2.5.*
   - SYMFONY_VERSION=2.6.*
   - SYMFONY_VERSION=2.7.*
   - SYMFONY_VERSION=2.8.*
   - SYMFONY_VERSION=3.0.*
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - php: hhvm
+  - SYMFONY_VERSION=3.2.*
 
 before_install:
   - composer self-update