minLength and maxLength description switched in readme

[chaserelock]

readme has:
maxLength

The length of value must be greater than or equal to expected value

{ maxLength: 8 }
minLength

The length of value must be lesser than or equal to expected value

{ minLength: 8 }

But in reality, the descriptions are the opposite. maxLength requires the value to be less than or equal to maxLength. minLength requires the value to be greater than or equal to minLength.

[Swaagie]

Good catch, feel free to change and pull request.