fix: xml defaultNamespace serialization and detection #133

Job	Run time
Linting & Coding Standards	38s
Static Coding Analysis (py3.11 locked)	52s
Static Coding Analysis (py3.7 lowest)	51s
Test (ubuntu-latest py3.11 locked)	1m 9s
Test (ubuntu-latest py3.10 locked)	50s
Test (ubuntu-latest py3.9 locked)	48s
Test (ubuntu-latest py3.8 locked)	57s
Test (ubuntu-latest py3.7 locked)	47s
Test (windows-latest py3.11 locked)	2m 7s
Test (windows-latest py3.10 locked)	2m 36s
Test (windows-latest py3.9 locked)	3m 44s
Test (windows-latest py3.8 locked)	2m 45s
Test (windows-latest py3.7 locked)	1m 51s
Test (macos-latest py3.11 locked)	48s
Test (macos-latest py3.10 locked)	1m 22s
Test (macos-latest py3.9 locked)	1m 27s
Test (macos-latest py3.8 locked)	2m 55s
Test (macos-latest py3.7 locked)	2m 41s
Test (ubuntu-latest py3.7 lowest)	54s
	30m 2s

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