/**
 * Checks if `obj` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
 * `SyntaxError`, `TypeError`, or `URIError` object.
 *
 * @example
 * ```typescript
 * isError(new Error)
 * // => true
 *
 * isError(Error)
 * // => false
 * ```
 *
 * @param obj - The obj to check.
 * @returns Returns `true` if `obj` is an error object, else `false`.
 */
export declare const isError: (obj: unknown) => obj is Error;