Add more validators

[afucher]

Today we just have a few option of validators, would be good to have more.

You can take a look to the existing ones to check how to create a new validator.

Don't forget to add tests!

Some ideas of Validators:

• PercentageValidator
• EmailValidator
• DateValidator

Feel free to contribute with other validators than these.

[Reisclef]

What kind of validation would be required? Do you have any examples of good ones to add?

[cerapier]

I'll try adding a validator with its tests

[afucher]

Hey @Reisclef, I'll add some ideas of validator in the issue description.

[bulat-gab]

Hey, I added a DateValidator. Hope it's what you need