[elliptic] Adds Uint8Array as a BNInput (#35326)
[elliptic] Adds Uint8Array as a BNInput (#35326)

https://github.com/indutny/bn.js/blob/master/lib/bn.js#L144
```javascript
  BN.prototype._initArray = function _initArray (number, base, endian) {
    // Perhaps a Uint8Array
    assert(typeof number.length === 'number');
```
dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,dsebastien/DefinitelyTyped