chore: add code coverage to CI

.github/workflows/ci.yml

@@ -21,4 +21,13 @@ jobs:
         run: deno lint
 
       - name: run tests
-        run: deno task test
+        run: deno task test:ci
+
+      - name: generate coverage report
+        run: deno task coverage
+
+      - name: upload coverage
+        uses: codecov/codecov-action@v4
+        with:
+          files: ./cov.lcov
+          token: ${{ secrets.CODECOV_TOKEN }}

.gitignore

@@ -0,0 +1,2 @@
+cov.lcov
+cov/

deno.json

@@ -9,7 +9,9 @@
     "./ndjson": "./ndjson.ts"
   },
   "tasks": {
-    "test": "deno test --allow-read --allow-write --unstable-kv"
+    "coverage": "deno coverage --lcov --output=cov.lcov ./cov",
+    "test": "deno test --allow-read --allow-write --unstable-kv --parallel",
+    "test:ci": "deno test --allow-read --allow-write --unstable-kv --coverage=./cov --parallel"
   },
   "lock": false
 }