Standardize on hex info_hash and peer_id everywhere

[feross]

As @astro said:

It would be really helpful to have consistent conventions for info_hashes and peer_ids in the Webtorrent scope.

The options are:

Buffers: while binary safe, can't be used as dict keys
Binary strings: not printable, also I'm afraid of any Unicode mangling
Hex strings: printable, safe, my favourite

I also think hex is the way to go. This is a breaking change because before a string peerId was assumed to be 'utf8' and now it will be treated as 'hex'.

First PR out here: webtorrent/bittorrent-tracker#47

[feross]

This is fixed in d1f3925

Additional commits to dependencies:

• https://github.com/feross/bittorrent-swarm/commit/36b0d9062be7394277d1ae58bf74d792b5521296
• https://github.com/feross/webtorrent-tracker/commit/6f692abc4fc7048819cc2e01de0ce4d7253db697
• https://github.com/feross/webtorrent-swarm/commit/a52f9e98f077b3bca3daf30a1142ab1b61e9eb56

[feross]

FYI, @astro

[astro]

You rock!

[feross]

This is released as 0.17.0.