Bump irb from 1.17.0 to 1.18.0

Bumps [irb](https://github.com/ruby/irb) from 1.17.0 to 1.18.0.
- [Release notes](https://github.com/ruby/irb/releases)
- [Commits](ruby/irb@v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: irb
  dependency-version: 1.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -13,7 +13,7 @@ GEM
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    erb (6.0.2)
+    erb (6.0.4)
     eventmachine (1.2.7)
     ffi (1.17.4)
     ffi (1.17.4-x86_64-darwin)
@@ -28,7 +28,7 @@ GEM
     i18n (1.14.8)
       concurrent-ruby (~> 1.0)
     io-console (0.8.2)
-    irb (1.17.0)
+    irb (1.18.0)
       pp (>= 0.6.0)
       prism (>= 1.3.0)
       rdoc (>= 4.0.0)