chore: update lint and add codecov

.github/workflows/codecov.yml

@@ -0,0 +1,21 @@
+name: Test and coverage
+
+on:
+  pull_request:
+    branches: ['v3']
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run coverage
+        run: go test ./... -race -coverprofile=coverage.out -covermode=atomic
+      - name: Upload coverage to Codecov
+        if: success() || failure()
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: false
+          files: ./coverage.out
+          move_coverage_to_trash: true

.github/workflow/golangci-lint.yml → .github/workflows/golangci-lint.yml

@@ -4,7 +4,7 @@ on:
     tags:
       - v*
     branches:
-      - master
+      - v3
   pull_request:
 jobs:
   golangci:
@@ -15,5 +15,5 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.38
+          version: latest
           args: --timeout=5m