Release v1.2.0

What's Changed

Features

• Add DataContainer superclass by @psomhorst in #275
• Add Categories by @psomhorst in #281
• Add Parameter EELI calculation by @psomhorst in #269

Fixes

• Derive function arguments dbodor by @DaniBodor in #271
• Update error when vendor does not exist by @DaniBodor in #282

Full Changelog: v1.1.1...v1.2.0