Merge pull request #1347 from Skgland/min-rust-version

Set minimum rust version in Cargo.toml

.github/workflows/test.yml

@@ -38,3 +38,13 @@ jobs:
         with:
           command: test
           args: --verbose --all --no-default-features --features num
+  msrv:
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+      - name: Install cargo-msrv
+        uses: baptiste0928/cargo-install@v1.1.0
+        with:
+          crate: cargo-msrv
+      - name: Verify MSRV
+        run: cargo msrv --verify

Cargo.toml

@@ -10,6 +10,7 @@ license = "BSD-3-Clause"
 keywords = ["prolog", "prolog-interpreter", "prolog-system"]
 categories = ["command-line-utilities"]
 build = "build.rs"
+rust-version = "1.57"
 
 [workspace]
 members = ["crates/num-rug-adapter",
@@ -72,4 +73,4 @@ predicates-core = "1.0.2"
 serial_test = "0.5.1"
 
 [profile.release]
-debug = true
+debug = true