Sync travis config with CMF packages

Author: wouterj

.travis.yml

@@ -13,17 +13,15 @@ cache:
     - $HOME/.composer/cache/files
 
 env:
-  - SYMFONY_VERSION=3.0.*
+  - SYMFONY_VERSION=3.2.*
 
 matrix:
   include:
-    - php: 7.0
-      env: DEPS=dev
+    - php: 7.1
+      env: SYMFONY_VERSION=3.3.* DEPS=dev
     - php: 5.5
-      env: COMPOSER_FLAGS="--prefer-lowest"
-    - php: 7.0
-      env: SYMFONY_VERSION=2.8.*
-    - php: 7.0
+      env: SYMFONY_VERSION=2.8.* COMPOSER_FLAGS="--prefer-lowest"
+    - php: 7.1
       env: SYMFONY_VERSION=3.1.*
   fast_finish: true