vendor validation

[crazy-max]

Adds vendor validation.

[codecov-commenter]

Codecov Report

Merging #230 (46f1002) into master (6627597) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #230   +/-   ##
=======================================
  Coverage   51.13%   51.13%           
=======================================
  Files           9        9           
  Lines         659      659           
=======================================
  Hits          337      337           
  Misses        286      286           
  Partials       36       36           

Impacted Files	Coverage Δ
client/client.go	67.53% <ø> (ø)
client/command.go	0.00% <ø> (ø)
credentials/credentials.go	52.33% <ø> (ø)
credentials/error.go	37.03% <ø> (ø)
osxkeychain/osxkeychain_darwin.go	71.07% <ø> (ø)
pass/pass.go	40.56% <ø> (ø)
registryurl/parse.go	66.66% <ø> (ø)
secretservice/secretservice_linux.go	0.00% <ø> (ø)
wincred/wincred_windows.go	78.35% <ø> (ø)

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[thaJeztah]

LGTM

[thaJeztah]

nice!