v0.12.0

Full Changelog

Enhancements:

• contributions concepts: type and identifiedBy #131 (by @rerowep)
• concepts: unified pid #132 (by @rerowep)
• VIAF: add sources #123 (by @rerowep)

Fixes:

• VIAF: fixes #136 (by @rerowep)
• dependencies: fix security issues #130 (by @rerowep)
• concepts: fix MEF links #133 (by @rerowep)