ci: add code coverage benchmark

.github/workflows/ci.yml

@@ -66,16 +66,31 @@ jobs:
        run: npm run test
 
   benchmark:
-    name: 'Run stylus benchmark with node16'
+    name: 'Run stylus benchmark with node18'
     runs-on: ubuntu-latest
     steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
-         node-version: '16'
+         node-version: '18'
      - name: Install npm dependencies
        run: npm install
      - name: Print put node & npm version
        run: node --version && npm --version 
      - name: Run Benchmark
        run: node ./bm.js
+
+  coverage:
+    name: 'Run nyc for code coverage'
+    runs-on: ubuntu-latest
+    steps:
+     - uses: actions/checkout@v3
+     - uses: actions/setup-node@v3
+       with:
+         node-version: '18'
+     - name: Print put node & npm version
+       run: node --version && npm --version
+     - name: Install npm dependencies
+       run: npm install
+     - name: Run nyc
+       run: npx nyc@latest npm run test

package.json

@@ -25,8 +25,7 @@
   },
   "scripts": {
     "prepublish": "npm prune",
-    "test": "mocha test/ test/middleware/ --require chai --bail --check-leaks --reporter dot",
-    "test-cov": "mocha test/ test/middleware/ --require chai --bail --reporter html-cov > coverage.html"
+    "test": "mocha test/ test/middleware/ --require chai --bail --check-leaks --reporter dot"
   },
   "dependencies": {
     "css": "^3.0.0",