This release adds initial support for a new "entities" specification layer.

What's Changed

• Simplify Android API checking by @seadowg in #692
• Expose created entities after finalizing form by @seadowg in #691
• Handle empty saveto questions by @seadowg in #694
• Update entities features for new spec by @seadowg in #697

Full Changelog: v3.5.0...v4.0.0