.travis.yml in jekyll-feed-0.9.3 vs .travis.yml in jekyll-feed-0.10.0

@@ -3,15 +3,15 @@
 sudo: false
 rvm:
 - 2.5
 - 2.4
 - 2.3
-- 2.2
 env:
   global:
   - NOKOGIRI_USE_SYSTEM_LIBRARIES=true
 before_install:
 - gem update --system
+- gem install bundler
 before_script: bundle update
 script: script/cibuild
 notifications:
   email: false
 deploy: