Merge pull request #238 from tobexyz/dependabot/bundler/docs/concurrent-ruby-1.3.7

chore(deps): bump concurrent-ruby from 1.3.6 to 1.3.7 in /docs

Author: tobexyz

docs/Gemfile.lock

@@ -24,7 +24,7 @@ GEM
     coffee-script-source (1.12.2)
     colorator (1.1.0)
     commonmarker (0.23.10)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     dnsruby (1.70.0)
       simpleidn (~> 0.2.1)