Merge pull request #706 from Data-Liberation-Front/dependabot/bundler/pusher-2.0.3

Bump pusher from 2.0.2 to 2.0.3

Author: Floppy

Gemfile.lock

@@ -523,7 +523,7 @@ GEM
     public_suffix (5.0.0)
     puma (6.0.0)
       nio4r (~> 2.0)
-    pusher (2.0.2)
+    pusher (2.0.3)
       httpclient (~> 2.8)
       multi_json (~> 1.15)
       pusher-signature (~> 0.1.8)