Chore: Housekeeping tasks (#721)

- End point to return api version
- Move agent bot listener to sync dispatcher
- gem update

spec/controllers/api_controller_spec.rb

@@ -0,0 +1,11 @@
+require 'rails_helper'
+
+RSpec.describe 'API Base', type: :request do
+  describe 'request to api base url' do
+    it 'returns api version' do
+      get '/api/'
+      expect(response).to have_http_status(:success)
+      expect(response.body).to include(Chatwoot.config[:version])
+    end
+  end
+end