ci-test.yml: Upload coverage to Codecov uses: codecov/codecov-action@…

…v4 (#24)

* ci-test.yml: Upload coverage to Codecov uses: codecov/codecov-action@v3

The breaking change happens in v4...
* https://github.com/codecov/codecov-action/releases
* https://github.com/codecov/codecov-action/releases/tag/v4.0.0
* https://docs.codecov.com/docs/adding-the-codecov-token#github-actions

* ci-test.yml: Upload coverage to Codecov uses: codecov/codecov-action@v4

.github/workflows/ci-test.yml

@@ -1,4 +1,4 @@
-# This workflow will install Python dependencies, run tests and lint with a single version of Python
+# This workflow will install Python dependencies, run tests, and lint with a single version of Python
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
 name: CI
@@ -30,10 +30,10 @@ jobs:
       - name: Lint with ruff
         run: |
           poetry run ruff check --diff .
-      - name: Check black
+      - name: Format with ruff
         run: |
           poetry run ruff format --check --diff .
-      - name: Check mypy
+      - name: Check type hints mypy
         run: |
           poetry run mypy .
       - name: Test with pytest
@@ -42,7 +42,7 @@ jobs:
           poetry run coverage report && \
           poetry run coverage xml -o cov.xml
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v2
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           env_vars: OS,PYTHON