Version 3.0.1

Patch release for updated dependencies

• Update dependencies
  - python-stix2 (2.1.0)
  - stix2validator (2.0.2)
  - stixmarx (1.0.8)

• Other changes:
  - Implement semantics of patterns more correctly
  - Impose predicable order for terms in pattern expression involving pdf files
  - Clear location object cache