Update the action for golangci-lint

[bmoffatt]

Description of changes:

Updating the version of the linter we use, and switching over to using it's github action

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[codecov-commenter]

Codecov Report

Merging #303 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #303   +/-   ##
=======================================
  Coverage   77.66%   77.66%           
=======================================
  Files          17       17           
  Lines         761      761           
=======================================
  Hits          591      591           
  Misses        116      116           
  Partials       54       54           

Impacted Files	Coverage Δ
lambda/function.go	88.37% <ø> (ø)

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