don't use all features for test run

Author: mherrerarendon

.github/workflows/pr.yml

@@ -15,4 +15,4 @@ jobs:
     - name: Install the Rust toolchain
       uses: actions-rust-lang/setup-rust-toolchain@v1
     - name: Run the tests
-      run: cargo test --all-features
+      run: cargo test