ci: add codecov.io coverage for mocha

Bug: #17

.github/workflows/unit.yml

@@ -33,3 +33,9 @@ jobs:
         run: du -sh lib/iife/mapperTab.js
       - name: Run unit tests
         run: npm run unit
+      - name: Run coverage
+        run: npx nyc --reporter=lcov npm run unit && npx codecov
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d # v3.1.4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -16,3 +16,4 @@ wptreport*.json
 .wireit/
 MANIFEST.json
 *.png
+coverage/

.prettierignore

@@ -8,3 +8,4 @@ tests/__pycache__
 wpt/
 wpt-metadata/*/
 CHANGELOG.md
+coverage/

package.json

@@ -5,7 +5,6 @@
   "scripts": {
     "build": "wireit",
     "clean": "rimraf lib .eslintcache .wireit",
-    "coverage": "nyc mocha",
     "e2e-headful": "wireit",
     "e2e-headless": "wireit",
     "e2e": "npm run e2e-headless --",