Update travis.yml with PHP 7.1

DonCallisto · web-flow · commit 37d7a8e12abc · 2017-06-09T11:58:13.000+02:00
Added PHP 7.1 to `travis.yml` in order to test the codebase against PHP 7.1
diff --git a/.travis.yml b/.travis.yml
@@ -6,6 +6,7 @@ php:
   - 5.5
   - 5.6
   - 7.0
+  - 7.1
 
 env:
   - SYMFONY_VERSION='2.7.*'

-Original file line number
+Diff line change
   - 5.5
   - 5.6
   - 7.0
 +  - 7.1
 env:
   - SYMFONY_VERSION='2.7.*'