[WIP] Add travis support for PHP 7.0-7.2

.travis.yml

@@ -1,23 +1,37 @@
+dist: trusty
+sudo: false
 language: php
 
+cache:
+  directories:
+    - $HOME/.composer/cache/files
+
 php:
   - 5.3
   - 5.4
-  - 5.5
+  - 5.5    
   - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - nightly
 
-env:
-  - SYMFONY_VERSION=2.3.*
-  - SYMFONY_VERSION=2.5.*
-  - SYMFONY_VERSION=2.6.*
-
-cache:
-  directories:
-    - $HOME/.composer/cache
+matrix:
+    include:
+        - php: 5.6
+          env: COMPOSER_FLAGS='--prefer-lowest --prefer-stable' SYMFONY_DEPRECATIONS_HELPER=weak
+        - php: 7.1
+          env: DEPENDENCIES='dev'
+        # Test LTS version
+        - php: 5.6
+          env: SYMFONY_VERSION='^2'
+        - php: 7.1
+          env: SYMFONY_VERSION='^3'
 
 before_install:
-  - sh -c "if [ `php-config --vernum` -ge 50500 ] ; then pecl config-set preferred_state beta; printf "yes\n" | pecl install apcu ; else echo 'extension="apc.so"' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini ;fi"
-  - composer self-update
-  - composer require --no-update symfony/symfony:${SYMFONY_VERSION}
+  - if [ `php-config --vernum` -ge 50500 ] ; then pecl config-set preferred_state beta; printf "yes\n" | pecl install apcu ; else echo 'extension="apc.so"' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini ; fi;
+  - if [ "$DEPENDENCIES" == "dev" ]; then composer config minimum-stability dev; fi;
+  - if [ "$SYMFONY_VERSION" != "" ]; then composer require symfony/lts:${SYMFONY_VERSION} --no-update; fi;
 
-install: composer install
+install:
+    - composer update $COMPOSER_FLAGS --prefer-dist