v0.12.0

This release contains new generalized async processing logic, and some other fixes to additionalProperties in the v3 Schema.

The generalized async code written by @Baliedge replaces the specific/custom async processing code originally implemented per struct in the models. The async code is to allow for maximum speed when building models and one of my principals for this project.

This async code is required to provide a fix for the following downstream PRs and issues.

• #138
• #109
• #119

The next update in this release is a fix in the Schema to correctly handle additionalProperties. Originally it had an any type, because folks do crazy things with this property.

However, it's been cemented as a DynamicProperty and can now either be a Schema, or a bool.

• #180

@TristanSpeakEasy
@Baliedge