Fixed travis.yml for PHP5.3 and PHP7

.travis.yml

@@ -3,12 +3,9 @@ language: php
 sudo: false
 
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6
-  - 7.0
-  - hhvm
 
 matrix:
     fast_finish: true
@@ -18,6 +15,14 @@ matrix:
     include:
         - php: 5.3
           env: COMPOSER_FLAGS="--prefer-lowest"
+          dist: precise
+        - php: 7.0
+          before_script:
+            - curl -sSfL -o ~/.phpenv/versions/7.0/bin/phpunit https://phar.phpunit.de/phpunit-5.7.phar
+        - php: hhvm
+          before_script:
+            - curl -sSfL -o ~/.phpenv/versions/hhvm/bin/phpunit https://phar.phpunit.de/phpunit-5.7.phar
+
 
 before_install:
     - travis_retry composer self-update