Perform license expression validation

[Hritik14]

Following should be validated using license-expression

https://github.com/nexB/vulnerablecode/blob/283ef0d8878b953b88fb12043b962ab6c59bbb22/vulnerabilities/importer.py#L226

via: https://github.com/nexB/vulnerablecode/wiki/WeeklyMeetings#meeting-on-tuesday-2022-02-15-at-1000-utc