docs: add telegram metadata (#509)

* docs: add telegram metadata

* docs: add crates meta

Author: gakonst

Diff for: README.md

@@ -3,6 +3,11 @@
 **Complete Ethereum and Celo wallet implementation and utilities in Rust**
 
 ![Github Actions](https://github.com/gakonst/ethers-rs/workflows/Tests/badge.svg)
+[![Telegram Chat](https://img.shields.io/endpoint?color=neon&style=flat-square&url=https%3A%2F%2Ftg.sumanjay.workers.dev%2Fethers_rs)](https://t.me/ethers_rs)
+[![Crates.io][crates-badge]][crates-url]
+
+[crates-badge]: https://img.shields.io/crates/v/ethers.svg
+[crates-url]: https://crates.io/crates/ethers
 
 ## Documentation