feature: added unread_count and fixed linting errors

Author: nijeesh-stream

lib/stream-chat/client.rb

@@ -363,7 +363,7 @@ def mark_all_read(user_id)
     # Get unread count for a user.
     sig { params(user_id: String).returns(StreamChat::StreamResponse) }
     def get_unread_count(user_id)
-      get("/unread", params: { user_id: user_id })
+      get('/unread', params: { user_id: user_id })
     end
 
     # Pins a message.

spec/client_spec.rb

@@ -562,13 +562,13 @@ def loop_times(times)
       expect(resp['total_unread_count']).to eq 0
     end
 
-    it "gets unread count if there are unread messages" do
+    it 'gets unread count if there are unread messages' do
       @channel.send_message({ text: 'Hello world' }, @random_user[:id])
       resp = @client.get_unread_count(@user_id)
       expect(resp['total_unread_count']).to eq 1
     end
 
-    it "gets unread count for a channel" do
+    it 'gets unread count for a channel' do
       @message = @channel.send_message({ text: 'Hello world' }, @random_user[:id])
       resp = @client.get_unread_count(@user_id)
       expect(resp['total_unread_count']).to eq 1