update travis.yml

.travis.yml

@@ -1,38 +1,35 @@
+sudo: false
+
 language: php
 
 php:
-    - 5.4
     - 5.5
     - 5.6
     - 7.0
     - hhvm
 
+cache:
+    directories:
+        - $HOME/.composer/cache/files
+
 env:
-    - SYMFONY_VERSION="~2.5.0"
-    - SYMFONY_VERSION="~2.6.0"
-    - SYMFONY_VERSION="~2.7.0"
-    - SYMFONY_VERSION="~2.8.0"
-    - SYMFONY_VERSION="~3.0.0"
-    - SYMFONY_VERSION="dev-master"
+    - COMPOSER_FLAGS="--prefer-lowest"
+    - SYMFONY_VERSION="^2.8.2"
+    - SYMFONY_VERSION="^2.8.2" COMPOSER_FLAGS="--prefer-lowest"
 
 matrix:
     fast_finish: true
+
     allow_failures:
         - php: hhvm
-        - env: SYMFONY_VERSION="~3.0.0"
-        - env: SYMFONY_VERSION="dev-master"
-    exclude:
-        # Symfony 3.x requires PHP 5.5
-        - php: 5.4
-          env: SYMFONY_VERSION="~3.0.0"
-        - php: 5.4
-          env: SYMFONY_VERSION="dev-master"
 
-sudo: false
+before_install:
+    - phpenv config-rm xdebug.ini
+    - composer self-update
+    - if [ "${SYMFONY_VERSION}" != "" ]; then composer require --no-update "symfony/symfony:${SYMFONY_VERSION}"; fi;
 
-before_script:
-    - curl -s http://getcomposer.org/installer | php
-    - php composer.phar require --no-update symfony/symfony:${SYMFONY_VERSION}
-    - php composer.phar install --prefer-source
+install:
+    - composer update ${COMPOSER_FLAGS} --prefer-source
 
-script: ./vendor/bin/phpunit --coverage-text
+script:
+    - vendor/bin/phpunit --colors