github/workflows/test: only run coverage once

Coveralls requires a special setup for multiple builds. However,
coverage should be the same for all Python versions, so only run
it once.

Author: dlech

.github/workflows/test.yml

@@ -37,10 +37,12 @@ jobs:
       - uses: actions/checkout@v3
       - run: poetry install --only=main --only=test
       - run: poetry run pytest
+        if: matrix.python-version != '3.10'
       - run: poetry run coverage run
-      - run: |
-          pipx install coveralls
-          pipx inject coveralls coverage[toml]
-      - run: coveralls --service=github
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        if: matrix.python-version == '3.10'
+      - run: poetry run coverage xml
+        if: matrix.python-version == '3.10'
+      - uses: coverallsapp/github-action@v2
+        if: matrix.python-version == '3.10'
+        with:
+          file: coverage.xml

.gitignore

@@ -65,4 +65,5 @@ demo/_*.py
 
 # Coveage
 .coverage
+coverage.*
 htmlcov/