Support for converting possible boolean strings to actual boolean values

[vikneswaran20]

Support for converting the boolean type of string to actual boolean

Converting the logical booelan strings to respective booleans v.boolean('true'); // => true v.boolean('1'); // => true v.boolean('yes'); // => true v.boolean('false'); // => false v.boolean('0'); // => false v.boolean('no'); // => false

The comparisons are case insensitive The list of truth values we can consider -> 'true', true, '1', 1, 'yes', 'on'

If this is fine I will submit a pull request for this function implementation.

[panzerdp]

Thanks for idea. For now I'm not interested in such a function because I see it has limited usage.