package maintenance

- update to TS6
- replace ncc by rollup, which seems to now be the recommended workflow according to <https://github.com/actions/typescript-action>
- remove buildjet provider, as they are shutting down, see <https://buildjet.com/for-github-actions/blog/we-are-shutting-down>

.github/workflows/warpbuild.yml

@@ -0,0 +1,37 @@
+name: warpbuild
+
+on: [push, pull_request]
+
+permissions: {}
+
+jobs:
+  warpbuild:
+    if: github.repository == 'Swatinem/rust-cache'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    name: Test warpbuild provider on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    env:
+      CARGO_TERM_COLOR: always
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - run: rustup toolchain install stable --profile minimal --no-self-update
+
+      - uses: ./
+        with:
+          workspaces: tests
+          cache-provider: warpbuild
+
+      - run: |
+          cargo check
+          cargo test
+          cargo build --release
+        working-directory: tests