/**
* Recursively read directory
* @param {string[]=[]} arr This doesn't have to be provided, it's used for the recursion
* @param {string=dir`} rootDir Used to replace the initial path, only the relative path is left, it's faster than path.relative.
* @returns Array holding all relative paths
*/
export declare function recursiveReadDirSync(dir: string, arr?: string[], rootDir?: string): string[];