Remove PHP 5.5

mpociot · mpociot · commit d4ca5fce3f3c · 2017-03-14T07:29:32.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,9 @@
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
+  - 7.1
 
 before_script:
   - travis_retry composer self-update
