Minecraft wiki entry for Development_versions, associated text: Updates to how blocks are handled in APIs:
BlockType, BlockPermutation, and Block instances replace BlockState-based updating
Exposed chest block component and Container
Added location and velocity read-only properties to Entity
function createExplosion(location : Location, radius : number, explosionOptions : ExplosionOptions)
Creates an explosion
ExplosionOptions : class
Provides additional configuration parameters for createExplosion
method triggerEvent(eventName : string)
Triggers an event on an entity
Added thenExecuteFor to GameTestSequence, which repeatedly calls the callback for the specified number of ticks