2.1.0

Added

• FeatureSet.NESTED_CALLS

Changed

• FeatureSets are now enum flags.

Fixed

• If func.tail_call(...).__r<operation>__(<other>) does not exist then other.__<operation>__(func.tail_call(...)._resolve()) will be tried. E.g.: [1, 2] + func.tail_call(...) is now supported.