Install the latest Bundler

bcylin · bcylin · commit e167703715c1 · 2019-02-24T22:28:20.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -9,6 +9,7 @@ before_install:
   - export LANG=en_US.UTF-8
   - xcrun instruments -s devices
   - xcrun instruments -w "iPhone X (12.0) [" || true
+  - gem install bundler
 install:
   - make install
 before_script:
