Using stable in CI as rustc nightly seems broken

.github/workflows/test.yml

@@ -21,10 +21,10 @@ jobs:
     - name: Install latest nightly to test also against unstable feature flag
       uses: actions-rs/toolchain@v1
       with:
-            toolchain: nightly
+            toolchain: stable
             override: true
             components: rustfmt
     - name: Run tests
-      run: cargo test --all-features --verbose --workspace
+      run: cargo test --features mmap,brotli-compression,lz4-compression,snappy-compression,failpoints --verbose --workspace
     - name: Check Formatting
       run: cargo fmt --all -- --check