feat: support Uint8Array input in place of Buffer

[Gozala]

With this change all the Buffer inputs were replaced by Uint8Array which is backwards compatible since Buffer is a subclass.

This does make an assumption that "bytes" encoder used to take Buffer|string here:

https://github.com/ipfs/protons/blob/3b5276f052f2e17c2d806d27cd9a88e156588977/src/compile/encodings.js#L30-L43

Fixes #12

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[Gozala]

I have propagated changes from the ipfs-utils and addressed comments from @hugomrdias

I do not understand what is the problem here https://codecov.io/gh/ipfs/protons/compare/3b5276f052f2e17c2d806d27cd9a88e156588977...8ee9c9febd7c8e1e0d348a53a15c03721d81ce25 navigating to that URL does not really provide any info. Any help on resolving that would be greatly appreciated.

[Gozala]

@rvagg I have added node 14 as requested. Tried adding 'current' as well but Travis seems unable to resolve that on on windows and failing.

@achingbrain @hugomrdias is there anything else I need to do to get this merged ?

I also have no clue what to do regarding codecov failure there. Going there this is what I see

Clicking around doesn't provide much info either & I'm really not sure how any of these changes affect coverage.

[Gozala]

@achngbrain this is what this pull attempt to do https://github.com/ipfs/js-ipfs/pull/3070

[Gozala]

@achingbrain you've asked me yesterday to update libp2p with new protons to ensure things don't break. I've started looking into it and found out that there quite few other dependencies more levels deep:

https://www.npmjs.com/package/protons

However we also discovered that even though I am not updating libp2p and those other dependencies bundle ends up with my patched version (I'm guessing because version is the same):

That is to suggest that all IPFS tests run with protons changes.

So is there anything else needs to be done to land this ? If so could you please let me know ?

Thanks