tests: replace nyc with c8

.c8rc.json

@@ -0,0 +1,15 @@
+{
+  "all": true,
+  "lines": 100,
+  "functions": 100,
+  "statements": 100,
+  "branches": 100,
+  "instrument": true,
+  "extension": [".ts"],
+  "include": ["src/**/*"],
+  "exclude": ["src/index.ts"],
+  "reporter": ["lcov", "text-summary", "json"],
+  "check-coverage": true,
+  "reportDir": "./target/coverage",
+  "tempDirectory": "./target/c8_output"
+}

.github/workflows/ci.yml

@@ -3,6 +3,20 @@ name: CI
 on: [push, pull_request]
 
 jobs:
+  code-coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js v14
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14
+      - run: npm ci
+      - run: npm run test:unit:coverage
+      - name: Upload code coverage to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          file: target/coverage/coverage-final.json
   build:
     runs-on: ubuntu-latest
     strategy:
@@ -31,10 +45,5 @@ jobs:
         run: npm run compile
       - name: Run tests
         run: |
-          npm run test:unit:coverage
+          npm run test:unit
           npm run test:integration
-      - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v1
-        with:
-          token: ${{secrets.CODECOV_TOKEN}}
-          file: target/coverage/clover.xml