Refactor various architectural things

[mrnerdhair]

Based on #350 and #351.

With the advent of web v2, we have an opportunity to make a breaking API change and release an hdwallet 2.0. This is a collection of a bunch of stuff that would be nice to do, at least some of which changes the external API enough that it'll probably break an existing client.

This isn't done yet, but it's ready for some comments.

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[BitHighlander]

this @peculiar/webcrypto patch is blowing up my world. node_modules/@peculiar/webcrypto/index.d.ts:5:10 - error TS2416: Property 'getRandomValues' in type 'Crypto' is not assignable to the same property in base type 'Crypto'. Type '<T extends Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | ... 4 more ... | null>(array: T) => T' is not assignable to type '<T extends ArrayBufferView | null>(array: T) => T'. Types of parameters 'array' and 'array' are incompatible. debugging this after pulling in your code down into my fork. ```

[BitHighlander]

and why are we patching my own package :( @bithighlander/bitcoin-cash-js-lib submit a pr! ill merge!

[BitHighlander]

running on node v16.6.2

[mrnerdhair]

this @peculiar/webcrypto patch is blowing up my world.

So that error is the exact thing the patch is supposed to fix -- are you sure patch-package is being run properly?

[0xean]

closing as stale. @mrnerdhair - please re-open as necessary.