Test all packages in workspace instead of all.

This is more in line with the repo containing a cargo workspace.

Author: wt

.github/workflows/ci.yml

@@ -28,4 +28,4 @@ jobs:
         with:
           toolchain: ${{ matrix.rust }}
       - name: Run tests
-        run: cargo test --all --exclude cortex-m-rt --exclude testsuite --features cortex-m/critical-section-single-core
+        run: cargo test --workspace --exclude cortex-m-rt --exclude testsuite --features cortex-m/critical-section-single-core