Bump webrick from 1.8.2 to 1.9.0 (#741)

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/ruby/webrick/releases)
- [Commits](ruby/webrick@v1.8.2...v1.9.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -13,4 +13,4 @@ gem 'tzinfo', '~> 2.0'
 gem 'tzinfo-data', '~> 1.2', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
 # Since Ruby 3.0 webrick isn't included in Ruby anymore.
-gem "webrick", "~> 1.8"
+gem "webrick", "~> 1.9"

Gemfile.lock

@@ -288,7 +288,7 @@ GEM
     uri (0.13.1)
     verbal_expressions (0.1.5)
     wdm (0.2.0)
-    webrick (1.8.2)
+    webrick (1.9.0)
 
 PLATFORMS
   ruby
@@ -301,7 +301,7 @@ DEPENDENCIES
   tzinfo (~> 2.0)
   tzinfo-data (~> 1.2)
   wdm (>= 0.1.0)
-  webrick (~> 1.8)
+  webrick (~> 1.9)
 
 BUNDLED WITH
    2.0.1