Lock Travis distro so new future defaults will not break the build

clue · clue · commit d0b1152d8800 · 2017-08-04T16:31:39.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,6 +7,9 @@ php:
   - 5.6
   - 7
 
+# lock distro so new future defaults will not break the build
+dist: precise
+
 # also test against HHVM, but require "trusty" and ignore errors
 # also test lowest dependencies on PHP 5.3 and PHP 7
 matrix:
