Add codecov coverage report uploading (#83)

* split out generating lcov file vs showing coverage in the terminal

* Integrate with codecov.

.github/maintainers_guide.md

@@ -21,7 +21,7 @@ deno task test
 To run the tests along with a coverage report:
 
 ```zsh
-deno task coverage
+deno task test:coverage
 ```
 
 This command is also executed by GitHub Actions, the continuous integration service, for every Pull Request and branch.

.github/workflows/deno-ci.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Setup repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup Deno
         uses: denoland/setup-deno@v1
@@ -31,9 +31,10 @@ jobs:
         run: deno task test
 
       - name: Generate CodeCov-friendly coverage report
-        run: deno task coverage
+        run: deno task generate-lcov
 
       - name: Upload coverage to CodeCov
-        uses: codecov/codecov-action@v3.1.0
+        uses: codecov/codecov-action@v4
         with:
           file: ./lcov.info
+          token: ${{ secrets.CODECOV_TOKEN }}

deno.jsonc

@@ -32,7 +32,8 @@
   },
   "tasks": {
     "test": "deno fmt --check && deno lint && deno test --allow-read --allow-net --allow-write --allow-run --allow-env src",
-    "coverage": "rm -rf .coverage && deno test --reporter=dot --allow-read --allow-net --allow-write --allow-run --allow-env --coverage=.coverage src && deno coverage --exclude=fixtures --exclude=test --lcov --output=lcov.info .coverage && deno run --allow-read https://deno.land/x/code_coverage@0.2.0/cli.ts"
+    "generate-lcov": "rm -rf .coverage && deno test --reporter=dot --allow-read --allow-net --allow-write --allow-run --allow-env --coverage=.coverage src && deno coverage --exclude=fixtures --exclude=test --lcov --output=lcov.info .coverage",
+    "test:coverage":"deno task generate-lcov && deno coverage --exclude=fixtures --exclude=test .coverage"
   },
   "lock": false
 }