Update .travis.yml php version

ganlvtech · ganlvtech · commit 10002053236d · 2019-03-11T22:39:17.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,8 @@
 language: php
 
+php:
+  - '7.2'
+
 install:
   - composer install
 
