Remove AcceptOrigins and add AcceptInsecureOrigin

[nhooyr]

Closes #39

[codecov]

Codecov Report

Merging #55 into master will increase coverage by <.01%.
The diff coverage is 70.45%.

@@            Coverage Diff             @@
##           master      #55      +/-   ##
==========================================
+ Coverage   77.11%   77.12%   +<.01%     
==========================================
  Files          11       11              
  Lines         673      682       +9     
==========================================
+ Hits          519      526       +7     
- Misses        128      130       +2     
  Partials       26       26

Impacted Files	Coverage Δ
messagetype_string.go	0% <0%> (ø)
json.go	56.25% <50%> (ø)	⬆️
websocket.go	78.73% <88.88%> (+0.04%)	⬆️
accept.go	87.23% <93.33%> (-0.14%)	⬇️

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