Use latest Rubygems in Travis

A bug in Rubgems < 2.6.9 prevents the rainbow gem from being installed. See: ku1ik/rainbow#44
apiology · Feb 12, 2017 · b5519d7 · b5519d7
1 parent 8196980
commit b5519d7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,5 @@
 sudo: required
+before_install: gem update --system
 dist: trusty
 language: ruby
 rvm: