Update the MSRV to 1.56.

It appears windows-sys 0.52 has an MSRV of 1.56. Update the errno crate
to 1.56 as well.

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        rust: [stable, nightly, '1.48']
+        rust: [stable, nightly, '1.56']
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -26,7 +26,7 @@ jobs:
           toolchain: ${{ matrix.rust }}
       # Workaround link failures if XCode 14 is combined with Rust <= 1.53
       - name: Downgrade to XCode 13
-        if: ${{ matrix.os == 'macos-latest' && matrix.rust == '1.48' }}
+        if: ${{ matrix.os == 'macos-latest' && matrix.rust == '1.56' }}
         uses: maxim-lobanov/setup-xcode@v1
         with:
           xcode-version: '13'

Cargo.toml

@@ -10,7 +10,7 @@ documentation = "https://docs.rs/errno"
 repository = "https://github.com/lambda-fairy/rust-errno"
 description = "Cross-platform interface to the `errno` variable."
 categories = ["no-std", "os"]
-rust-version = "1.48"
+rust-version = "1.56"
 
 [target.'cfg(unix)'.dependencies]
 libc = { version = "0.2", default-features = false }

README.md

@@ -1,6 +1,6 @@
 # errno [![CI](https://github.com/lambda-fairy/rust-errno/actions/workflows/main.yml/badge.svg)](https://github.com/lambda-fairy/rust-errno/actions/workflows/main.yml) [![Cargo](https://img.shields.io/crates/v/errno.svg)](https://crates.io/crates/errno)
 
-Cross-platform interface to the [`errno`][errno] variable. Works on Rust 1.48 or newer.
+Cross-platform interface to the [`errno`][errno] variable. Works on Rust 1.56 or newer.
 
 Documentation is available at <https://docs.rs/errno>.
 

clippy.toml

@@ -1 +1 @@
-msrv = "1.48"
+msrv = "1.56"