Add 'rust-version' to Cargo.toml

Author: justsmth

.github/workflows/bindgen.yml

@@ -46,7 +46,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          # MSRV below is documented in README.md, please update that if you
+          # MSRV below is documented in Cargo.toml and README.md, please update those if you
           # change this.
           toolchain: 1.56.1
           override: true

Cargo.toml

@@ -17,6 +17,8 @@ homepage = "https://rust-lang.github.io/rust-bindgen/"
 version = "0.60.1"
 edition = "2018"
 build = "build.rs"
+# If you change this, also update README.md and msrv in .github/workflows/bindgen.yml
+rust-version = "1.56.1"
 
 include = [
   "LICENSE",