Merge pull request #25 from MultiMachineBuilder/dependabot/bundler/concurrent-ruby-1.3.7

Bump concurrent-ruby from 1.2.2 to 1.3.7

Author: Monniasza

Gemfile.lock

@@ -15,7 +15,7 @@ GEM
     coffee-script-source (1.11.1)
     colorator (1.1.0)
     commonmarker (0.23.10)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.3.7)
     dnsruby (1.70.0)
       simpleidn (~> 0.2.1)
     em-websocket (0.5.3)