chore: concurrent-ruby from 1.3.6 to 1.3.7

Author: marianayovcheva

Gemfile.lock

@@ -148,7 +148,7 @@ GEM
     cgi (0.5.1)
     climate_control (1.2.0)
     coderay (1.1.3)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.5)
     crack (1.0.1)
       bigdecimal