Update packages/babel/types/index.d.ts

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

Author: davidtaylorhq

packages/babel/types/index.d.ts

@@ -23,7 +23,7 @@ export interface RollupBabelInputPluginOptions
    *   const filter = createFilter(include, exclude, {});
    * @default undefined;
    */
-  filter?: (id: string, code: string) => Promise<boolean>;
+  filter?: (id: string, code: string) => Promise<boolean> | boolean;
   /**
    * An array of file extensions that Babel should transpile. If you want to transpile TypeScript files with this plugin it's essential to include .ts and .tsx in this option.
    * @default ['.js', '.jsx', '.es6', '.es', '.mjs']