增加大华sdk依赖库

‘liusuyi’

2023-10-16 c53a2ea070b48ecd9fbdba1f0851510a01efef89

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export function isPromise(maybePromise) {
    return (!!maybePromise &&
        !!maybePromise.then &&
        typeof maybePromise.then === 'function');
}