Bump irb from 1.6.3 to 1.6.4 (#2809)

Bumps [irb](https://github.com/ruby/irb) from 1.6.3 to 1.6.4.
- [Release notes](https://github.com/ruby/irb/releases)
- [Commits](https://github.com/ruby/irb/compare/v1.6.3...v1.6.4)

---
updated-dependencies:
- dependency-name: irb
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile

@@ -66,7 +66,7 @@ group :test do
     gem 'rdoc', '~> 6.5'
     gem 'browserstack-local', '~> 1.4'
 
-    gem 'irb', '~> 1.6', '>= 1.6.3'
+    gem 'irb', '~> 1.6'
     gem 'pry-byebug', '~> 3.10', '>= 3.10.1'
 
     gem 'rest-client', '~> 2.1.0'

Gemfile.lock

@@ -67,7 +67,7 @@ GEM
       concurrent-ruby (~> 1.0)
     io-console (0.6.0)
     io-like (0.3.1)
-    irb (1.6.3)
+    irb (1.6.4)
       reline (>= 0.3.0)
     json (2.6.3)
     matrix (0.4.2)
@@ -123,7 +123,7 @@ GEM
     rdoc (6.5.0)
       psych (>= 4.0.0)
     regexp_parser (2.8.0)
-    reline (0.3.2)
+    reline (0.3.3)
       io-console (~> 0.5)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
@@ -239,7 +239,7 @@ DEPENDENCIES
   eventmachine (~> 1.2, >= 1.2.7)
   execjs (~> 2.8, >= 2.8.1)
   geckodriver-helper (~> 0.24.0)
-  irb (~> 1.6, >= 1.6.3)
+  irb (~> 1.6)
   json
   maxmind-db (~> 1.1, >= 1.1.1)
   mime-types (~> 3.4, >= 3.4.1)