updating travis config

Author: Nyholm

.travis.yml

@@ -9,10 +9,10 @@ php:
 env:
   global:
     - TEST_COMMAND="composer test"
- matrix:
-  - SYMFONY_VERSION=3.0.*
-  - SYMFONY_VERSION=2.8.*
-  - SYMFONY_VERSION=2.7.*
+  matrix:
+    - SYMFONY_VERSION=3.0.*
+    - SYMFONY_VERSION=2.8.*
+    - SYMFONY_VERSION=2.7.*
 
 matrix:
   fast_finish: true
@@ -21,10 +21,7 @@ matrix:
     - env: SYMFONY_VERSION=3.0.*
   include:
     - php: 5.5
-      env:
-        - COMPOSER_FLAGS="--prefer-stable --prefer-lowest"
-        - COVERAGE=true
-        - TEST_COMMAND="composer test-ci"
+      env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" && COVERAGE=true && TEST_COMMAND="composer test-ci"
 
 before_install:
   - travis_retry composer self-update