Travis: removing hhvm, tweaking allow_failures, fixing DEPENDENCIES handling

Author: weaverryan

.travis.yml

@@ -5,7 +5,6 @@ php:
   - 5.6
   - 7.0
   - 7.1
-  - hhvm
 
 env:
   global:
@@ -25,9 +24,7 @@ matrix:
     - php: 7.1
       env: STABILITY="dev"
   allow_failures:
-    - php: 7.1
-      env: STABILITY="dev"
-    - php: hhvm
+    - env: STABILITY="dev"
 
 sudo: false
 
@@ -37,8 +34,8 @@ cache:
 
 before_install:
   - if [[ -v $STABILITY ]]; then composer config minimum-stability $STABILITY; fi;
-  - if [ "$SYMFONY_VERSION" != "" ]; then composer require "symfony/symfony:${SYMFONY_VERSION}" --no-update; fi;
-  - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then echo "memory_limit=2G" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini; fi;
+  - if [[ -v $DEPENDENCIES ]]; then composer require --no-update $DEPENDENCIES; fi;
+  - echo "memory_limit=2G" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
 
 install: composer update --prefer-dist --no-interaction $COMPOSER_FLAGS