Version 1.2.1 of fmu-dataio

What's Changed

• add pre-processed example and make fmu.realization not required by @perolavsvendsen in #261
• Handle content when given as dict by @perolavsvendsen in #262
• Use dependencies keyword on aggregation vs realization by @perolavsvendsen in #265
• Fix issue with aggregated table by @alifbe in #254

Full Changelog: 1.2.0...1.2.1