Bump pusher from 1.4.3 to 2.0.0 (#13107)

Bumps [pusher](https://github.com/pusher/pusher-http-ruby) from 1.4.3 to 2.0.0.
- [Release notes](https://github.com/pusher/pusher-http-ruby/releases)
- [Changelog](https://github.com/pusher/pusher-http-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pusher/pusher-http-ruby/compare/v1.4.3...2.0.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -69,7 +69,7 @@ gem "pg", "~> 1.2" # Pg is the Ruby interface to the PostgreSQL RDBMS
 gem "pg_search", "~> 2.3.5" # PgSearch builds Active Record named scopes that take advantage of PostgreSQL's full text search
 gem "puma", "~> 5.2.2" # Puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server
 gem "pundit", "~> 2.1" # Object oriented authorization for Rails applications
-gem "pusher", "~> 1.4" # Ruby library for Pusher Channels HTTP API
+gem "pusher", "~> 2.0" # Ruby library for Pusher Channels HTTP API
 gem "pusher-push-notifications", "~> 2.0" # Pusher Push Notifications Ruby server SDK
 gem "rack-attack", "~> 6.5.0" # Used to throttle requests to prevent brute force attacks
 gem "rack-cors", "~> 1.1" # Middleware that will make Rack-based apps CORS compatible

Gemfile.lock

@@ -539,7 +539,7 @@ GEM
       activesupport (>= 3.0.0)
     pundit-matchers (1.6.0)
       rspec-rails (>= 3.0.0)
-    pusher (1.4.3)
+    pusher (2.0.0)
       httpclient (~> 2.8)
       multi_json (~> 1.15)
       pusher-signature (~> 0.1.8)
@@ -948,7 +948,7 @@ DEPENDENCIES
   puma (~> 5.2.2)
   pundit (~> 2.1)
   pundit-matchers (~> 1.6)
-  pusher (~> 1.4)
+  pusher (~> 2.0)
   pusher-push-notifications (~> 2.0)
   rack-attack (~> 6.5.0)
   rack-cors (~> 1.1)