.travis.yml in capistrano-twingly-3.0.0 vs .travis.yml in capistrano-twingly-4.0.0

@@ -1,28 +1,15 @@
 language: ruby
 sudo: false
-
 rvm:
   - 2.4.2
   - ruby-head
-
 matrix:
   allow_failures:
     - rvm: ruby-head
   fast_finish: true
-
 before_install:
-  - gem install bundler
-
+  - gem uninstall -v '>= 2' -i $(rvm gemdir)@global -ax bundler || true
+  - gem install bundler -v '< 2'
 cache: bundler
-
 notifications:
   email: false
-  hipchat:
-    rooms:
-      secure: "ILGWgc1QgHVRhwxWgYo+DxLySgOPdwahOV8py1dlRhi4juRUvMcMJSFYvTS47T1Mm8JSJXGaJtEcz24YgWF4XQsL2OawntdxJDNuzmFhF0fC+syN3qHXVzaRIplfcbGOj5rW4Uga8HumvvrQl/g5fscgsGM02BAOKgJhRPM7YLY="
-    on_success: never
-    on_failure: change
-    template:
-    - '%{repository}#%{build_number} (%{branch} - %{commit} : %{author}): %{message}
-      (<a href="%{build_url}">Details</a>/<a href="%{compare_url}">Change view</a>)'
-    format: html