fix: misc updates (#132)

* misc updates

* bring back c8 for test coverage

* use new loader

* don't use engines

* simplify ci

* fix double slice problem

.github/workflows/ci.yml

@@ -14,42 +14,18 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macOS-latest]
-        node: ["16", "15", "14", "12", engines]
-        exclude:
-          # On Windows, run tests with only the LTS environments.
-          - os: windows-latest
-            node: engines
-          - os: windows-latest
-            node: "14"
-          # On macOS, run tests with only the LTS environments.
-          - os: macOS-latest
-            node: engines
-          - os: macOS-latest
-            node: "14"
+        node: ["17.3"]
 
     runs-on: ${{ matrix.os }}
+
     steps:
       - uses: actions/checkout@v2
-
-      - name: Get Node.JS version from package.json
-        if: matrix.node == 'engines'
-        id: get-version
-        run: echo ::set-output name=node::$(npx --q minimum-node-version)
-
-      - uses: actions/setup-node@v2-beta
-        if: matrix.node != 'engines'
+      - uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node }}
-
-      - uses: actions/setup-node@v2-beta
-        if: matrix.node == 'engines'
-        with:
-          node-version: ${{steps.get-version.outputs.node}}
-
+          node-version: '17.3'
       - run: npm install
-
+      - run: npm test
       - run: npm run report -- --colors
-
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v1
         with: