PHP 5.3 support is over

Signed-off-by: Hidehito Nozawa <[email protected]>

Author: suin

.travis.yml

@@ -1,7 +1,6 @@
 sudo: false
 language: php
 php:
-  - 5.3
   - 5.4
   - 5.5
   - 5.6
@@ -16,4 +15,4 @@ script: phpunit --coverage-text --configuration phpunit.xml.dist
 cache:
   directories:
     - tests/vendor
-    - $HOME/.composer/cache
+    - $HOME/.composer/cache