/**
 * 检查 `value` 是否是 `number` 类型，支持字符串校验
 *
 * @example
 * ```ts
 * isNumeric(3)
 * // => true
 * isNumeric('3.1415926')
 * // => true
 * ```
 */
export declare function isNumeric(value: any): value is number;