feat!(Cargo): update MSRV to 1.81.0

Author: samueltardieu

Cargo.toml

@@ -11,7 +11,7 @@ authors = ["Samuel Tardieu <sam@rfc1149.net>"]
 categories = ["algorithms"]
 readme = "README.md"
 edition = "2021"
-rust-version = "1.77.2"
+rust-version = "1.81.0"
 
 [package.metadata.release]
 sign-commit = true

src/lib.rs

@@ -76,7 +76,7 @@
 //! in this context, you can wrap them into compliant types using the
 //! [ordered-float](https://crates.io/crates/ordered-float) crate.
 //!
-//! The minimum supported Rust version (MSRV) is Rust 1.77.2.
+//! The minimum supported Rust version (MSRV) is Rust 1.81.0.
 //!
 //! [A*]: https://en.wikipedia.org/wiki/A*_search_algorithm
 //! [BFS]: https://en.wikipedia.org/wiki/Breadth-first_search