Test HHVM and 5.6

.travis.yml

@@ -4,16 +4,18 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - hhvm
 
 before_install:
   - composer self-update
   - composer install --dev -n --prefer-source
-  - pyrus install pear/PHP_CodeSniffer
+  - if [ "hhvm" != "$(phpenv version-name)" ]; then pyrus install pear/PHP_CodeSniffer; fi
   - phpenv rehash
 
 script:
   - mkdir -p build/logs
-  - phpcs --standard=PSR2 src/
+  - if [ "hhvm" != "$(phpenv version-name)" ]; then phpcs --standard=PSR2 src/; fi
   - phpunit -c phpunit.xml.dist
 
 after_script: