Travis: Test php 7.1+

Author: renatomefi

.travis.yml

@@ -3,10 +3,10 @@ language: php
 matrix:
   fast_finish: true
   include:
-    - php: 7.0
     - php: 7.1
     - env: COMPOSER_FLAGS="--prefer-lowest"
       php: 7.1
+    - php: 7.2
 
 before_install:
   - composer self-update