fix: minimum rust version

Author: gschup

Cargo.toml

@@ -3,7 +3,7 @@ name = "ggrs"
 version = "0.11.1"
 authors = ["Georg Schuppe <georg.schuppe@gmail.com>"]
 edition = "2021"
-rust-version = "1.66"
+rust-version = "`1.87"
 description = "GGRS is a reimagination of GGPO, enabling P2P rollback networking in Rust. Rollback to the future!"
 license = "MIT OR Apache-2.0"
 readme = "README.md"