ci: update coverage settings

pyproject.toml

@@ -108,3 +108,14 @@ env = "GH_TOKEN"
 [tool.semantic_release.publish]
 dist_glob_patterns = ["dist/*"]
 upload_to_vcs_release = true
+
+[tool.coverage.report]
+skip_empty = true # exclude empty *files*, e.g. __init__.py, from the report
+exclude_lines = [
+    "pragma: no cover",
+    "if TYPE_CHECKING:",
+    "return NotImplemented",
+    "raise NotImplementedError",
+    "\\.\\.\\.",
+    'if __name__ == "__main__":',
+]