v0.3.0

• Added IndexedDBEngine engine.
• A Bunch of new operators for filtering and updating have been added to engines. Read the docs and see EngineHelper.test.ts for examples.

Breaking changes

• Soukai.withEngine has been removed in favor of Soukai.requireEngine.
• Some method signatures have changed in the Engine interface. Check out those changes here.
• Model relations have been refactored to better reflect the nature of non-relational databases. Related model instances are now stored in the Relation instance, which is exposed in {relation-name}Relation. Relation definitions have also been renamed to use local/foreign nomenclature. Read the docs and see relations.test.ts for examples.
• Models hydration has been extracted and refactored into multiple protected methods: createFromEngineDocument, toEngineDocument, getDirtyEngineDocumentUpdates, syncDirty, cleanDirty, etc.