Add Pumpkin

Author: Snowiiii

README.md

@@ -1670,6 +1670,8 @@ See also [Are we game yet?](https://arewegameyet.rs)
 * gRPC
   * [hyperium/tonic](https://github.com/hyperium/tonic) - A native gRPC client & server implementation with async/await support [![Crates.io](https://img.shields.io/crates/v/tonic)](https://crates.io/crates/tonic)
   * [tikv/grpc-rs](https://github.com/tikv/grpc-rs) - The gRPC library built on C Core library and futures
+* Pumpkin
+  * [Pumpkin](https://github.com/pumpkin-mc/pumpkin) - A high-performance Minecraft server Software fully written in Rust
 * HTTP
   * [Hurl](https://github.com/Orange-OpenSource/hurl) - Run and test HTTP requests with plain text and libcurl [![CI](https://github.com/Orange-OpenSource/hurl/workflows/CI/badge.svg)](https://github.com/Orange-OpenSource/hurl/actions)
 * IPNetwork