fix: set correct port for v2 mainnet peers

[ItsANameToo]

@alexbarnsley here you go

[codecov-io]

Codecov Report

Merging #9 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master       #9   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files          23       23           
  Lines         219      219           
  Branches       18       18           
=======================================
  Hits          218      218           
  Misses          1        1

Impacted Files	Coverage Δ
lib/peers.js	100% <ø> (ø)	⬆️

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