ci: Add a job to test

This will fail because of duckdb/duckdb-rs#134, so we'll wait for that to resolve before merging

Author: max-sixty

.github/workflows/test-all.yaml

@@ -122,3 +122,14 @@ jobs:
         # Ideally we'd check all crates, ref https://github.com/foresterre/cargo-msrv/issues/295
         working-directory: prql-compiler
         run: cargo msrv verify
+
+  test-package-min-versions:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 📂 Checkout code
+        uses: actions/checkout@v3
+      - uses: baptiste0928/cargo-install@next
+        with:
+          crate: cargo-minimal-versions
+      - name: Verify minimum rust version
+        run: cargo minimal-versions test