Bump codecov/codecov-action from 2.1.0 to 3.0.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.1.0 to 3.0.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v2.1.0...v3.0.0)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/tests.yml

@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v2.3.1
@@ -114,7 +114,7 @@ jobs:
     needs: tests
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
 
       - name: Set up Python
         uses: actions/setup-python@v2.3.1
@@ -138,7 +138,7 @@ jobs:
           nox --version
 
       - name: Download coverage data
-        uses: actions/download-artifact@v2.1.0
+        uses: actions/download-artifact@v3
         with:
           name: coverage-data
 
@@ -151,4 +151,4 @@ jobs:
           nox --force-color --session=coverage -- xml
 
       - name: Upload coverage report
-        uses: codecov/codecov-action@v2.1.0
+        uses: codecov/codecov-action@v3.0.0