define MSRV as 1.60.0

according to [`cargo msrv`][] this is the lowest supported release.

[`cargo msrv`]: https://github.com/foresterre/cargo-msrv

Author: rursprung

Cargo.toml

@@ -2,6 +2,7 @@
 name = "tb6612fng"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.60"
 
 description = "A `no_std` driver for the TB6612FNG motor driver."
 repository = "https://github.com/rursprung/tb6612fng-rs"

README.md

@@ -22,3 +22,7 @@ See the documentation for usage examples.
 
 ## Optional features
 * `defmt`: you can enable the [`defmt`](https://defmt.ferrous-systems.com/) feature to get a `defmt::debug!` call for every speed change.
+
+## Minimum Supported Rust Version (MSRV)
+This crate is guaranteed to compile on stable Rust 1.60 and up. It *might*
+compile with older versions but that may change in any new patch release.