message: use nightly for tests
diff: @@ -18,6 +18,12 @@ jobs:
  - uses: actions/checkout@v2
  - name: Build
  run: cargo build --verbose --workspace
  + - name: Install latest nightly to test also against unstable feature flag
  + uses: actions-rs/toolchain@v1
  + with:
  + toolchain: nightly
  + override: true
  + components: rustfmt
  - name: Run tests
  run: cargo test --all-features --verbose --workspace
  - name: Check Formatting
  