Bump webrick from 1.7.0 to 1.8.2

Bumps [webrick](https://github.com/ruby/webrick) from 1.7.0 to 1.8.2.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.7.0...v1.8.2)

---
updated-dependencies:
- dependency-name: webrick
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -263,7 +263,7 @@ GEM
       json (>= 1.8)
       nokogiri (~> 1.6)
       rexml (~> 3.2)
-    webrick (1.7.0)
+    webrick (1.8.2)
     websocket (1.2.9)
 
 PLATFORMS