Fix AVAX, include AVAXC

[0xcharchar]

The current AVAX implementation is actually for the C-Chain, which is actually AVAXC according to SLIP-0044.

These changes are breaking but accomplish two things:

• Fix the AVAX implementation to parse X- & P- chains instead of the C-Chain
• Add in AVAXC support to continue parsing the C-Chain

A couple questions I have:

• Would you like the dist/ folder committed as well?
• Would you prefer the ID stripping to be its own function? My thinking was that it was unnecessary abstraction to make it a function

References:

• Avalanche docs - What is an address
• SLIP-0044

[0xcharchar]

The error in Travis looks like a problem with Node 18 and Travis, not the changes here.

[0xcharchar]

Sorry to ping you @christsim, is there any chance I can get a review on this?