Move coverage config to pyproject.toml, ignore pyvisgen/version.py

Author: aknierim

.coveragerc

@@ -60,12 +60,15 @@ write_to = "pyvisgen/_version.py"
 where = ["."]
 
 [tool.coverage.run]
-branch = true
 omit = [
+  "pyvisgen/version.py",
   "pyvisgen/_version.py",
   "docs/*"
 ]
 
+[tool.coverage.xml]
+output = "coverage.xml"
+
 [tool.towncrier]
 package = "pyvisgen"
 directory = "docs/changes"