Run minimal-versions

.github/workflows/build-and-test.yml

@@ -1,7 +1,11 @@
 ---
 name: Build and test
 on:
-  push:
+  pull_request:
+    paths:
+      - '**/*.rs'
+      - Cargo.toml
+      - Cargo.lock
   workflow_dispatch:
 
 env:
@@ -47,10 +51,22 @@ jobs:
         # The integration tests must run as root since they write firewall state (/dev/pf)
         run: sudo cargo test -- --test-threads=1
 
+  minimal-versions:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions-rs/toolchain@16499b5e05bf2e26879000db0c1d13f7e13fa3af #v1.0.7
+        with:
+          toolchain: nightly
+          profile: minimal
+          default: true
+
+      - name: Downgrade dependencies to minimal versions
+        run: cargo +nightly update -Z minimal-versions
+
       # Make sure the library builds with all dependencies downgraded to their
       # oldest versions allowed by the semver spec. This ensures we have not
       # under-specified any dependency
       - name: Compile with minimal versions
-        run: |
-          cargo +nightly update -Z minimal-versions
-          cargo build --all-targets
+        run: cargo build --all-targets