feat: prepare "contrib" area

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

Author: jkowalleck

cyclonedx/model/vulnerability.py

@@ -28,8 +28,8 @@
     See the CycloneDX Schema extension definition https://cyclonedx.org/docs/1.7/xml/#type_vulnerabilitiesType
 """
 
-import sys
 import re
+import sys
 from collections.abc import Iterable
 from datetime import datetime
 from decimal import Decimal