Update travis configuration

- Remove 5.5 targets
- Added "legacy deps" definition, and installation of these when using PHP 5.6
- Move coverage deps to an env variable

Author: weierophinney

.travis.yml

@@ -15,7 +15,9 @@ cache:
 
 env:
   global:
-    - COMPOSER_ARGS="--no-interaction --ignore-platform-reqs"
+    - COMPOSER_ARGS="--no-interaction"
+    - COVERAGE_DEPS="satooshi/php-coveralls"
+    - LEGACY_DEPS="phpunit/phpunit"
     - LATEST_DEPS="zendframework/zend-mvc-plugin-flashmessenger zendframework/zend-mvc-i18n zendframework/zend-mvc-console"
     - SITE_URL=https://zendframework.github.io/zend-view
     - GH_USER_NAME="Matthew Weier O'Phinney"
@@ -25,16 +27,6 @@ env:
 
 matrix:
   include:
-    - php: 5.5
-      env:
-        - DEPS=lowest
-    - php: 5.5
-      env:
-        - CS_CHECK=true
-        - DEPS=locked
-    - php: 5.5
-      env:
-        - DEPS=latest
     - php: 5.6
       env:
         - DEPS=lowest
@@ -78,10 +70,11 @@ before_install:
 
 install:
   - travis_retry composer install $COMPOSER_ARGS
+  - if [[ $TRAVIS_PHP_VERSION =~ ^5.6 ]]; then travis_retry composer update $COMPOSER_ARGS --with-dependencies $LEGACY_DEPS ; fi
   - if [[ $DEPS == 'latest' ]]; then travis_retry composer require --dev --no-update $COMPOSER_ARGS $LATEST_DEPS ; fi
   - if [[ $DEPS == 'latest' ]]; then travis_retry composer update $COMPOSER_ARGS ; fi
   - if [[ $DEPS == 'lowest' ]]; then travis_retry composer update --prefer-lowest --prefer-stable $COMPOSER_ARGS ; fi
-  - if [[ $TEST_COVERAGE == 'true' ]]; then composer require --dev --no-update satooshi/php-coveralls ; fi
+  - if [[ $TEST_COVERAGE == 'true' ]]; then travis_retry composer require --dev $COMPOSER_ARGS $COVERAGE_DEPS ; fi
   - composer show --installed
 
 script: