Use PHP 7.2 on travis (#889)

Nyholm · jbelien · commit e96e3aa79ce8 · 2018-09-15T10:48:17.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,7 @@
 language: php
 sudo: false
 
-php: 7.0
-
+php: 7.2
 
 install:
   - composer update --prefer-stable --prefer-dist
