v4.3.1

Improve checking against observables. These changes ensure that Threat Objects and Risk Objects are created correctly.

What's Changed

• Threat objects by @ljstella in #234
• New observable role enum by @ljstella in #243
• Update setuptools requirement from >=69.5.1,<73.0.0 to >=69.5.1,<74.0.0 by @dependabot in #245

Full Changelog: v4.3.0...v4.3.1