add proptest-macro to CI

Author: cameron1024

.github/workflows/rust.yml

@@ -46,6 +46,8 @@ jobs:
         run: cd proptest && cargo build --verbose
       - name: Run tests
         run: cd proptest && cargo test --verbose
+      - name: Run macro tests
+        run: cd proptest-macro && cargo test --verbose
       - name: Build coverage no-default-features
         if: ${{ matrix.build == 'stable' }}
         env: