add php7.1 test

wujunze · wujunze · commit f4f08930e162 · 2018-02-23T15:13:48.000+08:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 5.6
   - 7.0
+  - 7.1
 
 before_script:
   - composer self-update
