Bump MSRV to 1.71

Author: djc

.github/workflows/rust.yml

@@ -85,7 +85,7 @@ jobs:
       - name: Install MSRV toolchain
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.60"
+          toolchain: "1.71"
 
       - run: cargo check --locked --lib --all-features
 

Cargo.toml

@@ -2,7 +2,7 @@
 name = "rustls-native-certs"
 version = "0.8.0"
 edition = "2021"
-rust-version = "1.60"
+rust-version = "1.71"
 license = "Apache-2.0 OR ISC OR MIT"
 readme = "README.md"
 description = "rustls-native-certs allows rustls to use the platform native certificate store"