TST: drop pytest-cov plugin, use coverage directly

Author: neutrinoceros

.github/workflows/tests_conda.yml

@@ -36,7 +36,7 @@ jobs:
           numpy>1.13.3
           cython>=0.29.20
           pytest
-          pytest-cov
+          coverage
     - name: Install unstable dependencies
       if: matrix.experimental == true
       shell: bash -l {0}
@@ -57,4 +57,5 @@ jobs:
     - name: Run Tests
       shell: bash -l {0}
       run: |
-        pytest -vv test
+        coverage run -m pytest -vv test
+        coverage report

pyproject.toml

@@ -30,11 +30,10 @@ requires-python = ">=3.10"
 [dependency-groups]
 dev = [
     "check-manifest",
-    "coverage",
+    "coverage>=7.10.0",
     "coveralls",
     "cython>=0.29.20",
     "pytest",
-    "pytest-cov",
     "sphinx",
     "twine",
 ]
@@ -56,15 +55,14 @@ addopts = [
     "-ra",
     "-v",
     "--doctest-modules",
-    "--cov=cftime",
-    "--cov-report=term-missing",
 ]
 doctest_optionflags = [
     "NORMALIZE_WHITESPACE",
     "ELLIPSIS",
 ]
 
 [tool.coverage.run]
+source = ["src"]
 relative_files = true
 branch = true
 plugins = [
@@ -82,6 +80,7 @@ omit = [
 ]
 
 [tool.coverage.report]
+show_missing = true
 exclude_lines = [
     "pragma: no cover",
     "def __repr__",