Update Gemfile.lock to match version 16.0.1.rc.2

Fixes CI failures by updating the lockfile to match the current
gem version after rebasing onto master.

Author: ihabadham

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    react_on_rails (16.0.1.rc.0)
+    react_on_rails (16.0.1.rc.2)
       addressable
       connection_pool
       execjs (~> 2.5)