Update CI configs to v0.4.20

[pionbot]

Update lint scripts and CI configs.

[codecov]

Codecov Report

Merging #90 (154f94a) into master (b99eaeb) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #90   +/-   ##
=======================================
  Coverage   71.82%   71.82%           
=======================================
  Files          17       17           
  Lines         944      944           
=======================================
  Hits          678      678           
  Misses        204      204           
  Partials       62       62           

Flag	Coverage Δ
go	71.82% <ø> (ø)
wasm	71.82% <ø> (ø)

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