4.3.0

• Avoid thrown errors if the target doesn't have propertyIsEnumerable. #252

4.2.1

• Fix: falsey values can now be merged. #170

4.2.0

• Properties are now only overwritten if they exist on the target object and are enumerable. #164

Technically this could probably be a patch release since "which properties get overwritten" wasn't documented and accidentally overwriting a built-in function or some function up the property chain would almost certainly be undesirable, but it feels like a gray area, so here we are with a feature version bump.

4.0.0

• The main entry point in package.json is now a CommonJS module instead of a UMD module #155