fix: updated intanceof checks to allow Buffer intances

[theoboldfrazier]

Due to polyfill of Buffer on webv2, the function fromB64ToArray was returning type Buffer, instead of Uint8Array. This was causing an error to be thrown and blocking decryption of a wallet.

This PR updates the checks to allow instanceof Buffer in addition to the existing ArrayBuffer and Uint8Array types.

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Name	Status	Preview	Updated
hdwallet	✅ Ready (Inspect)	Visit Preview	Jul 23, 2022 at 0:46AM (UTC)

[mrnerdhair]

Double-checking; is this issue still relevant / can we close this?

[cjthompson]

It seems to me that Buffer is a valid input to those functions, seeing as how no code changes were needed to support Buffer. I don't see a downside here.

[0xean]

closing as stale.