Travis: use system ruby on osx

Fix https://travis-ci.org/junegunn/vim-plug/jobs/573145961#L211-L217
junegunn · Aug 17, 2019 · 1ce889d · 1ce889d
1 parent 3b29e1e
commit 1ce889d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -28,6 +28,7 @@ matrix:
     - env: ENV=osx-10.14
       os: osx
       osx_image: xcode10.2
+      rvm: system
 install: |
   git config --global user.email "you@example.com"
   git config --global user.name "Your Name"