Update dependencies

We're using an older version of Gun (0.2020.116) than the latest available (0.2020.520). Same is probably also true for SEA, IPFS, and WebRTC.

Time for some upgrades.

  • Gun
  • SEA
  • go-ipfs 0.4.22 -> 0.6.0
  • ipfs.js 0.40.0 -> 0.50.2
  • is-ipfs 0.6.3 -> 2.0.0
  • WebRTC
Edited by Michał "rysiek" Woźniak