extending isBoolean w/ "True"

[mathcoll]

Hello, what about extending the isBoolean function by allowing :

• "True"/"False" as valid boolean
• "yes"/"no" as valid boolean (can be discussed but could make sense)

validator.js/src/lib/isBoolean.js

Line 5 in d1a9b6d

return (['true', 'false', '1', '0'].indexOf(str) >= 0);

[fedeci]

It does make sense only behind an option that should default to false IMHO.
Like isBoolean(str, { loose: true }).

[brybrophy]

I opened this PR to add the loose option to isBoolean. #1676

[brybrophy]

I believe this issue can be closed now that #1676 was merged.

[tux-tn]

Thank you @brybrophy