Switch to codecov action with coverage merging

For this we update tox to allow combining piexif / pyexiv2 and / cov
options in the regular testenv.

.github/workflows/ci.yml

@@ -62,7 +62,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        toxenv: [pyqt515-cov, piexif, lint, packaging, mypy]
+        toxenv: [pyqt515-cov, pyqt515-piexif-cov, lint, packaging, mypy]
       fail-fast: false
     steps:
     - uses: actions/checkout@v3.3.0
@@ -81,9 +81,7 @@ jobs:
       env:
         CI: Github-Actions
     - name: Upload coverage to codecov
-      run: |
-        pip install codecov
-        codecov -X gcov
-      env:
-        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
-      if: matrix.toxenv == 'pyqt515-cov'
+      if: "endsWith(matrix.toxenv, '-cov')"
+      uses: codecov/codecov-action@v3
+      with:
+        name: "${{ matrix.toxenv }}"

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = pyqt-cov,piexif,pyexiv2,lint,packaging,mypy
+envlist = pyqt,pyqt-piexif,pyqt-pyexiv2,lint,packaging,mypy
 
 # Standard test suite using pytest
 [testenv]
@@ -16,24 +16,12 @@ deps =
     pyqt514: PyQt5==5.14.2
     pyqt515: -r{toxinidir}/misc/requirements/requirements.txt
     cov: -r{toxinidir}/misc/requirements/requirements_cov.txt
+    piexif: -r{toxinidir}/misc/requirements/requirements_piexif.txt
+    pyexiv2: -r{toxinidir}/misc/requirements/requirements_pyexiv2.txt
 
 commands_pre = {envpython} scripts/maybe_build_cextension.py
 commands = pytest {posargs}
 
-# Test suite using piexif
-[testenv:piexif]
-deps =
-    -r{toxinidir}/misc/requirements/requirements.txt
-    -r{toxinidir}/misc/requirements/requirements_tests.txt
-    -r{toxinidir}/misc/requirements/requirements_piexif.txt
-
-# Test suite without optional dependencies
-[testenv:pyexiv2]
-deps =
-    -r{toxinidir}/misc/requirements/requirements.txt
-    -r{toxinidir}/misc/requirements/requirements_tests.txt
-    -r{toxinidir}/misc/requirements/requirements_pyexiv2.txt
-
 # Linters and checkers for the source code
 [testenv:lint]
 ignore_errors = true