Swapped out Redis Pub/Sub, now using `pubsub`

What's new ? 🤔

Previously for communicating new tx(s) ( joining/ leaving mempool ) to clients subscribing to various topics, Redis Pub/Sub was used. Recently I also worked on developing one in-app messaging library for Go projects called pubsub, which leverages native Go functionalities for enabling in-app message passing in following patterns

• SPSC
• SPMC
• MPSC
• MPMC

You can read more about that library here

I decided to use pubsub, replacing Redis Pub/Sub. It after through testing everything seemed to fit well.

And here's release flaunting pubsub in harmony 🔥

✌️