Merge pull request #140 from danbee/dependabot/bundler/webpacker-4.2.2

Bumps [webpacker](https://github.com/rails/webpacker) from 4.2.0 to 4.2.2.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v4.2.0...v4.2.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -131,7 +131,7 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.0.0)
     nio4r (2.5.2)
-    nokogiri (1.10.5)
+    nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     oauth2 (1.4.0)
       faraday (>= 0.8, < 0.13)
@@ -250,7 +250,7 @@ GEM
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)
-    webpacker (4.2.0)
+    webpacker (4.2.2)
       activesupport (>= 4.2)
       rack-proxy (>= 0.6.1)
       railties (>= 4.2)