Add UUID parameter type

[clarkenciel]

Fixes #125

[codecov-io]

Codecov Report

Merging #126 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
+ Coverage   95.48%   95.54%   +0.06%     
==========================================
  Files           4        4              
  Lines         443      449       +6     
  Branches       94       95       +1     
==========================================
+ Hits          423      429       +6     
  Misses          6        6              
  Partials       14       14

Impacted Files	Coverage Δ
sanic_openapi/doc.py	100% <100%> (ø)	⬆️

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[chenjr0719]

First, thanks for your contribution.

The current problem is that I don't think OAPIUUID() is a good field name because it's naming rule is not consistent with other fields and also not intuition. I have give some feedback, please check it.

[clarkenciel]

@chenjr0719 Thanks for the review! I've made the changes you suggested. How is it looking now?

[chenjr0719]

@clarkenciel Looks great.