v0.15.0

Full Changelog

Enhancements:

• agent: remove bf:Agent #158 (by @rerowep)

Fixes:

• mef: corrects deleted #162 (by @rerowep)
• concepts: correct type #161 (by @rerowep)
• api: fix sources filter #149 (by @rerowep)

Other changes:

• pytest use black #164 (by @rerowep)
• dependencies: fix security issues #163 (by @rerowep)
• dependencies: fix security issues #157 (by @rerowep)
• dependencies: fix security issues #154 (by @rerowep)