Remove unstable library features

.github/workflows/build.yaml

@@ -9,6 +9,7 @@ jobs:
       matrix:
         platform: [ ubuntu-latest, macos-latest, windows-latest ]
         toolchain: [ stable, 1.35.0, nightly ]
+      fail-fast: false
     runs-on: ${{ matrix.platform }}
     steps:
       - uses: actions/checkout@v2
@@ -22,7 +23,7 @@ jobs:
           args: --release --all-features
       - uses: actions/upload-artifact@v2
         with:
-          name: ${{ matrix.platform }}
+          name: ${{ matrix.platform }}-${{ matrix.toolchain }}
           path: |
             target/release/nodtool
             target/release/nodtool.exe