Bump webrick from 1.7.0 to 1.8.1

Bumps [webrick](https://github.com/ruby/webrick) from 1.7.0 to 1.8.1.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.7.0...v1.8.1)

---
updated-dependencies:
- dependency-name: webrick
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile

@@ -5,4 +5,4 @@ gem "neat", ">= 1.0.0"
 gem 'jekyll-feed'
 
 
-gem "webrick", "~> 1.7"
+gem "webrick", "~> 1.8"

Gemfile.lock

@@ -61,7 +61,7 @@ GEM
       unicode-display_width (~> 1.1, >= 1.1.1)
     thor (0.20.3)
     unicode-display_width (1.7.0)
-    webrick (1.7.0)
+    webrick (1.8.1)
 
 PLATFORMS
   x86_64-linux
@@ -70,7 +70,7 @@ DEPENDENCIES
   jekyll (>= 3.6.3)
   jekyll-feed
   neat (>= 1.0.0)
-  webrick (~> 1.7)
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.2.16