feat: `VulnerabilityAnalysis` properties for issued/updated datetime

[jkowalleck]

the data model VulnerabilityAnalysis is missing some properties.
for example:

• first_issued - https://cyclonedx.org/docs/1.6/json/#vulnerabilities_items_analysis_firstIssued
• last_updated - https://cyclonedx.org/docs/1.6/json/#vulnerabilities_items_analysis_lastUpdated

[indiVar0508]

I can take this will try to raise a PR asap...