Polish for stable release

[nhooyr]

Closes #70

[codecov]

Codecov Report

Merging #84 into master will increase coverage by 1.48%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
+ Coverage   81.43%   82.91%   +1.48%     
==========================================
  Files          10       11       +1     
  Lines         824      843      +19     
==========================================
+ Hits          671      699      +28     
+ Misses        126      117       -9     
  Partials       27       27

Impacted Files	Coverage Δ
limitedreader.go	100% <100%> (ø)
websocket.go	81.14% <100%> (+2.5%)	⬆️

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