/**
 * Use mapKeys to convert object keys to another format using the specified conversion function.
 *
 * E.g., to deep convert all object keys to camelCase:  mapKeys(myObj, _.camelCase, true)
 * to shallow convert object keys to lower case:  mapKeys(myObj, _.toLower)
 *
 * NOTE: This mutates the object passed in for conversion.
 *
 * @param target - {Object} The object to convert the keys
 * @param converter - {Function} The function that converts the object key
 * @param deep - {boolean} Whether to do a deep object key conversion
 * @return {Object} - the object with the converted keys
 */
export default function mapKeys<T>(obj: T, converter: (key: string) => string, deep?: boolean): Record<string, unknown>;