Bump irb from 1.12.0 to 1.13.0

Bumps [irb](https://github.com/ruby/irb) from 1.12.0 to 1.13.0.
- [Release notes](https://github.com/ruby/irb/releases)
- [Commits](ruby/irb@v1.12.0...v1.13.0)

---
updated-dependencies:
- dependency-name: irb
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -146,8 +146,8 @@ GEM
     i18n (1.14.4)
       concurrent-ruby (~> 1.0)
     io-console (0.7.2)
-    irb (1.12.0)
-      rdoc
+    irb (1.13.0)
+      rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     iso-639 (0.3.6)
     jbuilder (2.12.0)