Force uninstall to avoid prompt

kpaulisse · kpaulisse · commit efa2d4c6dbdd · 2017-11-13T11:30:55.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -5,7 +5,7 @@ install: true
 script: "script/cibuild"
 
 before_install:
-  - gem uninstall bundler
+  - gem uninstall --force bundler
   - gem install bundler -v 1.15.4
 
 matrix:
