Remove unsupported versions of PHP

jeremykendall · jeremykendall · commit d109c3442186 · 2017-10-03T22:34:33.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,9 +3,6 @@ sudo: false
 dist: trusty
 
 php:
-  - '5.4'
-  - '5.5'
-  - '5.6'
   - '7.0'
   - '7.1'
   - nightly

-Original file line number
+Diff line change
 dist: trusty
 php:
 -  - '5.4'
 -  - '5.5'
 -  - '5.6'
   - '7.0'
   - '7.1'
   - nightly