specify ruby version for CI

CI is currently failing because the default ruby on travis.org is 2.0, but a dependency xcpretty, requires the latest activesupport, which requires ruby >=2.2
2016-06-30 16:45:26 -07:00
1 changed files with 1 additions and 0 deletions
--- a/.ruby-version
+++ b/.ruby-version
@ -0,0 +1 @@
+2.3.1