Enhance Uint8Array judgment

[waterbang]

I hope to enhance the judgment of Uint8Array.

Avoid the following problems.

 console.log('Is chunk Uint8Array?', chunk instanceof Uint8Array) // expect  true
 console.log('Type of chunk:', Object.prototype.toString.call(chunk) === '[object Uint8Array]') // expect [object Uint8Array]
// Is chunk Uint8Array? true
// Type of chunk: true
// Is chunk Uint8Array? false
// Type of chunk: true
// Is chunk Uint8Array? false
// Type of chunk: true
// Is chunk Uint8Array? true
// Type of chunk: true
// Is chunk Uint8Array? true
// Type of chunk: true

Avoid problems caused by Uint8Array not being the same.