Bump MSRV to 1.60.0

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to Rust's notion of
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- MSRV is now 1.60.0.
+
 ## [0.5.1] - 2023-03-02
 ### Fixed
 - Fix a bug on 32-bit platforms that could cause the square root implementation

Cargo.toml

@@ -9,7 +9,7 @@ authors = [
     "Jack Grigg <jack@electriccoin.co>",
 ]
 edition = "2021"
-rust-version = "1.56"
+rust-version = "1.60"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/zcash/pasta_curves"
 documentation = "https://docs.rs/pasta_curves"

README.md

@@ -8,7 +8,7 @@ Pallas and Vesta. More details about the Pasta curves can be found
 
 ## Minimum Supported Rust Version
 
-Requires Rust **1.56** or higher.
+Requires Rust **1.60** or higher.
 
 Minimum supported Rust version can be changed in the future, but it will be done with a
 minor version bump.

rust-toolchain.toml

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.56.0"
+channel = "1.60.0"
 components = [ "clippy", "rustfmt" ]