document MSRV

Author: sunshowers

.github/workflows/ci.yml

@@ -38,14 +38,16 @@ jobs:
     strategy:
       matrix:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
+        # 1.56 is the MSRV
+        rust-version: [ 1.56, stable ]
       fail-fast: false
     env:
       RUSTFLAGS: -D warnings
     steps:
       - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
-          toolchain: stable
+          toolchain: ${{ matrix.rust-version }}
           override: true
       - uses: Swatinem/rust-cache@c5ed9ba6b7e1bb8aff90d43acd2f0af4990fa57c
       - name: Build

README.md

@@ -54,6 +54,11 @@ fn my_test(path: &Path) -> datatest_stable::Result<()> {
 datatest_stable::harness!(my_test, "path/to/fixtures", r"^.*/*");
 ```
 
+## Minimum supported Rust version (MSRV)
+
+The minimum supported Rust version is **Rust 1.56**. MSRV bumps may be accompanied by a minor
+version update; at any time, at least the last 3 stable versions of Rust will be supported.
+
 ## See also
 
 * [`datatest`](https://crates.io/crates/datatest): the original inspiration for this crate,

src/lib.rs

@@ -51,6 +51,11 @@
 //! datatest_stable::harness!(my_test, "path/to/fixtures", r"^.*/*");
 //! ```
 //!
+//! # Minimum supported Rust version (MSRV)
+//!
+//! The minimum supported Rust version is **Rust 1.56**. MSRV bumps may be accompanied by a minor
+//! version update; at any time, at least the last 3 stable versions of Rust will be supported.
+//!
 //! # See also
 //!
 //! * [`datatest`](https://crates.io/crates/datatest): the original inspiration for this crate,