Updated travis config (#1)

* Updated travis config

* Allow failuers on HHVM

.travis.yml

@@ -12,15 +12,29 @@ branches:
 php:
     - 7.0
     - 7.1
+    - hhvm
 env:
   global:
     - TEST_COMMAND="composer test"
   matrix:
     - SYMFONY_VERSION=3.2.*
     - SYMFONY_VERSION=2.7.*
 
+matrix:
+  fast_finish: true
+  include:
+    - php: 7.0
+      env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci" SYMFONY_VERSION=2.7.*
+  allow_failures:
+    - php: hhvm
+
 install:
-    - travis_retry composer update --prefer-dist --no-interaction
+    - composer require symfony/symfony:${SYMFONY_VERSION} --no-update
+    - travis_retry composer update ${COMPOSER_FLAGS} --prefer-dist --no-interaction
 
 script:
     - $TEST_COMMAND
+
+after_success:
+    - if [[ $COVERAGE = true ]]; then wget https://scrutinizer-ci.com/ocular.phar; fi
+    - if [[ $COVERAGE = true ]]; then php ocular.phar code-coverage:upload --format=php-clover build/coverage.xml; fi