💅 Migrate coveragerc to use source_pkgs

.coveragerc

@@ -1,33 +1,47 @@
-[run]
-include =
-  src/*
-  testing/*
-  */lib/python*/site-packages/_pytest/*
-  */lib/python*/site-packages/pytest.py
-  */pypy*/site-packages/_pytest/*
-  */pypy*/site-packages/pytest.py
-  *\Lib\site-packages\_pytest\*
-  *\Lib\site-packages\pytest.py
-parallel = 1
-branch = 1
+[html]
+show_contexts = true
+skip_covered = false
 
 [paths]
-source = src/
-  */lib/python*/site-packages/
-  */pypy*/site-packages/
-  *\Lib\site-packages\
+_site-packages-to-src-mapping =
+  src
+  */src
+  *\src
+  */lib/pypy*/site-packages
+  */lib/python*/site-packages
+  *\Lib\site-packages
 
 [report]
-skip_covered = True
-show_missing = True
-exclude_lines =
-    \#\s*pragma: no cover
-    ^\s*raise NotImplementedError\b
-    ^\s*return NotImplemented\b
-    ^\s*assert False(,|$)
-    ^\s*assert_never\(
+skip_covered = true
+skip_empty = true
+show_missing = true
+exclude_also =
+  \#\s*pragma: no cover
+  ^\s*raise NotImplementedError\b
+  ^\s*return NotImplemented\b
+  ^\s*assert False(,|$)
+  ^\s*assert_never\(
+
+  ^\s*if TYPE_CHECKING:
+  ^\s*@overload( |$)
 
-    ^\s*if TYPE_CHECKING:
-    ^\s*@overload( |$)
+  ^\s*@pytest\.mark\.xfail
 
-    ^\s*@pytest\.mark\.xfail
+[run]
+branch = true
+cover_pylib = false
+# https://coverage.rtfd.io/en/latest/contexts.html#dynamic-contexts
+# `dynamic_context` conflicts with `pytest-cov` if set here
+dynamic_context = test_function
+omit =
+  test_eggs.py
+  test_ham.py
+  test_spam.py
+parallel = true
+plugins =
+relative_files = true
+source =
+  .
+source_pkgs =
+  _pytest
+  pytest