message: fix: wrong copy api
diff: @@ -12,7 +12,7 @@ export type VFS = typeof promises & {
  remove(target: string): Promise<void>;
  missing(target: string): Promise<boolean>;
  exists(target: string): Promise<boolean>;
  - copy(src: string, dest: string, filter: (name: string) => boolean): Promise<void>;
  + copy(src: string, dest: string, filter?: (name: string) => boolean): Promise<void>;
  waitStream(stream: NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream): Promise<void>;
  validate(target: string, ...validations: { algorithm: string, hash: string }[]): Promise<boolean>;
  };
  