tweak build matrix some more

Author: lsmith77

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6
@@ -12,29 +11,23 @@ sudo: false
 
 cache:
   directories:
-    - $HOME/.composer/cache
-
-env:
-  - SYMFONY_VERSION=2.7.*
+    - $HOME/.composer/cache/files
 
 matrix:
   include:
+    - php: 5.3
+      env: SYMFONY_VERSION=2.3.* COMPOSER_FLAGS="--prefer-lowest"
     - php: 7.0
-      env: SYMFONY_VERSION=2.3.*
+      env: SYMFONY_VERSION=2.7.*
     - php: 7.0
       env: SYMFONY_VERSION=2.8.*
-    - php: 7.0
-      env: SYMFONY_VERSION=3.0.*
-    - php: 5.3
-      env: SYMFONY_VERSION=2.3.* COMPOSER_FLAGS="--prefer-lowest"
   fast_finish: true
 
 before_install:
-  - composer self-update
-  - if [[ "$TRAVIS_PHP_VERSION" != "hhvm" ]]; then echo "memory_limit = -1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini; fi
-  - composer require symfony/symfony:${SYMFONY_VERSION} --no-update
-  
-install: composer update --prefer-source $COMPOSER_FLAGS
+  - composer self-update || true
+  - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then echo "memory_limit = -1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini; fi
+  - if [ "$SYMFONY_VERSION" != "" ]; then composer require --no-update symfony/symfony=$SYMFONY_VERSION; fi;
+  - COMPOSER_ROOT_VERSION=dev-master composer update $COMPOSER_FLAGS --prefer-source --no-interaction
 
 script: phpunit --coverage-text