Drop using codecov for coverage reporting

.github/workflows/ci.yml

@@ -50,10 +50,9 @@ jobs:
       run: |
         python -m tox -e flake8-critical
 
-
   test:
     name: "Python ${{ matrix.python-version }}"
-    needs: lint
+    needs: [lint, build-package]
     runs-on: ubuntu-latest
 
     strategy:
@@ -89,33 +88,39 @@ jobs:
     - name: "Test with tox for ${{ matrix.python-version }}"
       run: |
         python -m tox
+        ls .cov*
 
-    - name: "Combine coverage"
-      run: |
-        set -xe
-        python -m coverage xml
+    - name: Upload coverage data
+      uses: actions/upload-artifact@v3
+      with:
+          name: coverage-data
+          path: ".coverage*"
+          if-no-files-found: ignore
 
-    - name: "Upload to Codecov"
-      uses: codecov/codecov-action@v1
+  coverage-report:
+    name: "Combined coverage"
+    runs-on: ubuntu-latest
+    needs: test
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/download-artifact@v3
+      with:
+        name: coverage-data
+    - uses: actions/setup-python@v4
       with:
-        token: ${{ secrets.CODECOV_TOKEN }}
-        fail_ci_if_error: true
+        python-version: "3.11"
+    - run: python -Im pip install --upgrade tox coverage[toml]
 
-  package:
-    name: "Build & verify package"
-    runs-on: "ubuntu-latest"
+    - name: "Combine coverage"
+      run: |
+        set -xe
+        python -m tox -e coverage-html
 
-    steps:
-      - uses: "actions/checkout@v2"
-      - uses: "actions/setup-python@v2"
-        with:
-          python-version: "3.11"
+        # Report and write to summary.
+        python -Im coverage report --skip-covered --skip-empty | sed 's/^/    /' >> $GITHUB_STEP_SUMMARY
 
-      - name: "Install build and twine"
-        run: "python -m pip install build twine"
-      - name: "Build package"
-        run: "python -m build"
-      - name: "List result"
-        run: "ls -l dist"
-      - name: "Check long_description"
-        run: "python -m twine check dist/*"
+    - name: "Upload HTML report"
+      uses: actions/upload-artifact@v3
+      with:
+        name: html-report
+        path: htmlcov

tox.ini

@@ -5,7 +5,7 @@ envlist =
     py{37,38,39,310,311}
     coverage-html
 skip_missing_interpreters = True
-basepython = python3.8
+basepython = python3.11
 isolated_build = True
 
 [gh-actions]
@@ -32,7 +32,6 @@ commands =
     -coverage erase
 
 [testenv:coverage-html]
-basepython = python3.9
 deps =
     coverage
 setenv =
@@ -41,7 +40,6 @@ commands =
     coverage html --include="./src/*" --omit="*/test*"
 
 [testenv:coverage-xml]
-basepython = python3.9
 deps =
     coverage
 setenv =
@@ -64,6 +62,7 @@ commands =
 
 [coverage:run]
 source = ./src/.
+parallel=True
 
 [coverage:report]
 exclude_lines =