pass ChannelID to ValidatePush & ValidatePull

[dirkmc]

Fixes #209
Closes #219

[codecov-commenter]

Codecov Report

Merging #220 (b870378) into master (f80db17) will increase coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #220      +/-   ##
==========================================
+ Coverage   64.80%   64.92%   +0.12%     
==========================================
  Files          24       24              
  Lines        2648     2646       -2     
==========================================
+ Hits         1716     1718       +2     
+ Misses        585      582       -3     
+ Partials      347      346       -1     

Impacted Files	Coverage Δ
impl/events.go	72.75% <100.00%> (-0.20%)	⬇️
impl/restart.go	61.03% <100.00%> (ø)
network/libp2p_impl.go	72.26% <0.00%> (+3.36%)	⬆️

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[aarshkshah1992]

LGTM.