Migration

type Migration = {
  readonly dependsOn?: readonly MigrationId[] | undefined
  readonly id: MigrationId
} & (
  | {
      readonly down?: (
        newState: SerializedStore<UnknownRecord>
      ) => SerializedStore<UnknownRecord> | void
      readonly scope: 'store'
      readonly up: (
        oldState: SerializedStore<UnknownRecord>
      ) => SerializedStore<UnknownRecord> | void
    }
  | {
      readonly down?: (newState: UnknownRecord) => UnknownRecord | void
      readonly filter?: (record: UnknownRecord) => boolean
      readonly scope: 'record'
      readonly up: (oldState: UnknownRecord) => UnknownRecord | void
    }
)