migrade from codecov to coveralls

.github/workflows/main.yml

@@ -47,7 +47,13 @@ jobs:
       - name: tox
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: tox -e py,lint,coveralls,release
+          run: tox -e py,lint,release
+
+      - uses: codecov/codecov-action@v2
+        with:
+          name: ${{ matrix.os }}_${{ matrix.python-version}}
+          fail_ci_if_error: true
+          verbose: true
 
       - name: upload dist
         uses: actions/upload-artifact@v2

README.rst

@@ -6,9 +6,6 @@
       |_|_|_\___/\__,_\___|_| |_||_|_/__\___|
 
 
-.. image:: https://img.shields.io/coveralls/github/PyCQA/modernize?label=coveralls&logo=coveralls
-    :alt: Coveralls
-    :target: https://coveralls.io/github/PyCQA/modernize
 .. image:: https://img.shields.io/readthedocs/modernize?logo=read-the-docs
     :alt: Read the Docs
     :target: https://modernize.readthedocs.io/en/latest/

pyproject.toml

@@ -97,13 +97,6 @@ wheel_build_env = build
 # empty environment to build universal wheel once per tox invocation
 # https://github.com/ionelmc/tox-wheel#build-configuration
 
-[testenv:coveralls]
-passenv = GITHUB_*
-deps =
-  coveralls
-  coverage>=5.3
-commands = coveralls
-
 [testenv:lint]
 deps = pre-commit
 commands = pre-commit run --all-files --show-diff-on-failure {posargs}