Merge pull request #272 from mruby/dependabot/bundler/irb-1.18.0

Author: matz

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)