removing support for 5.3, 5.4, hhvm

.travis.yml

@@ -7,20 +7,14 @@ cache:
         - $HOME/.composer/cache/files
 
 php:
-    - 5.3
-    - 5.4
     - 5.5
     - 5.6
     - 7.0
     - 7.1
-    - hhvm
 
 matrix:
     fast_finish: true
     include:
-        # Use precise for PHP 5.3
-        - php: 5.3
-          dist: precise
         # Test against lowest bounds of dependencies to ensure they are right
         - php: 5.6
           env: COMPOSER_FLAGS='--prefer-lowest --prefer-stable'
@@ -30,10 +24,6 @@ matrix:
         # test the latest release (including beta releases)
         - php: 7.1
           env: deps=beta
-    allow_failures:
-        - php: 5.3
-          dist: trusty # Only fail if dist is trustry
-        - php: hhvm
 
 before_install:
     - if [ "$deps" = 'beta' ]; then perl -pi -e 's/^}$/,"minimum-stability":"beta"}/' composer.json; fi;