feat: add MSRV of 1.71

Author: mkroening

.github/workflows/ci.yml

@@ -35,6 +35,14 @@ jobs:
         with:
           components: rustfmt
       - run: cargo fmt --all --check
+      
+  msrv:
+    name: MSRV
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@1.71
+      - run: cargo build
 
   test:
     name: Test

Cargo.toml

@@ -3,6 +3,7 @@ name = "endian-num"
 version = "0.2.0"
 authors = ["Martin Kröning <mkroening@posteo.net>"]
 edition = "2021"
+rust-version = "1.71"
 description = "Byte-order-aware numeric types."
 repository = "https://github.com/rust-osdev/endian-num"
 license = "MIT OR Apache-2.0"