ci: Migrate from Coveralls to Codecov

Author: jpmckinney

.github/workflows/ci.yml

@@ -15,8 +15,8 @@ jobs:
           python-version: ${{ matrix.python-version }}
           cache: pip
           cache-dependency-path: pyproject.toml
-      - run: pip install .[test] coveralls
+      - run: pip install .[test]
       - run: pytest --cov agateexcel
-      - env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: coveralls --service=github
+      - uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5.5.1
+        with:
+          fail_ci_if_error: true

README.rst

@@ -2,8 +2,8 @@
     :target: https://github.com/wireservice/agate-excel/actions
     :alt: Build status
 
-.. image:: https://coveralls.io/repos/wireservice/agate-excel/badge.svg?branch=master
-    :target: https://coveralls.io/r/wireservice/agate-excel
+.. image:: https://codecov.io/github/wireservice/agate-excel/graph/badge.svg
+    :target: https://codecov.io/github/wireservice/agate-excel
     :alt: Coverage status
 
 .. image:: https://img.shields.io/pypi/dm/agate-excel.svg