Update MSRV to 1.58.0

Required for the format arguments capture feature which is used in #12.

Fixes #14.

.github/workflows/ci.yaml

@@ -66,7 +66,7 @@ jobs:
       - name: Install Rust toolchain
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: "1.56.0"
+          toolchain: "1.58.0"
           profile: minimal
           override: true
 

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0" # remember to set `html_root_url` in `src/lib.rs`.
 authors = ["Ryan Lopopolo <rjl@hyperbo.la>"]
 license = "MIT"
 edition = "2021"
-rust-version = "1.56.0"
+rust-version = "1.58.0"
 readme = "README.md"
 repository = "https://github.com/artichoke/strftime-ruby"
 documentation = "https://docs.rs/strftime-ruby"

README.md

@@ -51,7 +51,7 @@ All features are enabled by default.
 
 ### Minimum Supported Rust Version
 
-This crate requires at least Rust 1.56.0. This version can be bumped in minor
+This crate requires at least Rust 1.58.0. This version can be bumped in minor
 releases.
 
 ## License