gs1.1 update get gossip peers

[wemeetagain]

Update getGossipPeers to suit gs 1.1 needs

• add filter param - filter peers before shuffling, will be used to filter peers by score, mesh inclusion, etc
• add gossipsub v1.1 protocol check - filter peers by gossipsub v1.0 and gossipsub v1.1 protocol strings

[codecov-commenter]

Codecov Report

Merging #90 into gsv1.1 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           gsv1.1      #90   +/-   ##
=======================================
  Coverage   80.00%   80.00%           
=======================================
  Files           1        1           
  Lines          10       10           
=======================================
  Hits            8        8           
  Misses          2        2           

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[vasco-santos]

LGTM