chore: update Codecov action in CI workflow

- Upgraded Codecov action from v3 to v4 for improved functionality
- Added CODECOV_TOKEN secret for secure coverage uploads

Author: SirStig

.github/workflows/test.yml

@@ -58,11 +58,12 @@ jobs:
       run: |
         pytest --cov=yokedcache --cov-report=xml --cov-report=term-missing
 
-    # - name: Upload coverage to Codecov
-    #   uses: codecov/codecov-action@v3
-    #   with:
-    #     file: ./coverage.xml
-    #     fail_ci_if_error: true
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4
+      with:
+        file: ./coverage.xml
+        token: ${{ secrets.CODECOV_TOKEN }}
+        fail_ci_if_error: true
 
   integration-test:
     runs-on: ubuntu-latest

codecov.yml

@@ -0,0 +1,48 @@
+codecov:
+  require_ci_to_pass: true
+  notify:
+    wait_for_ci: true
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...95"
+  
+  status:
+    project:
+      default:
+        target: 80%
+        threshold: 1%
+        if_no_uploads: error
+        if_not_found: success
+        if_ci_failed: error
+    patch:
+      default:
+        target: 80%
+        threshold: 1%
+        if_no_uploads: error
+        if_not_found: success
+        if_ci_failed: error
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "reach,diff,flags,tree"
+  behavior: default
+  require_changes: false
+
+ignore:
+  - "tests/"
+  - "examples/"
+  - "docs/"
+  - "htmlcov/"
+  - "**/__pycache__/"
+  - "*.pyc"
+  - "setup.py"
+  - "conftest.py"