message: fix: Update Theme type to be an interface
diff: +/* tslint:disable */
  declare module 'treat/theme' {
  - export type Theme = import('./makeTreatTheme').TreatTheme;
  + type BraidTheme = import('./makeTreatTheme').TreatTheme;
  +
  + export interface Theme extends BraidTheme {}
  }
  