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] <[email protected]>

Author: dependabot[bot]

Gemfile

@@ -7,4 +7,4 @@ group :jekyll_plugins do
     gem "jekyll-feed"
   end
 
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

Gemfile.lock

@@ -61,7 +61,7 @@ GEM
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
     unicode-display_width (1.8.0)
-    webrick (1.7.0)
+    webrick (1.8.2)
 
 PLATFORMS
   x86_64-darwin-17
@@ -73,7 +73,7 @@ DEPENDENCIES
   jekyll (~> 4.2)
   jekyll-feed
   jekyll-paginate
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.3.9