feat: add strict validation to phone number as an option

[optii]

Resolves #57.

Adds an option strict to define if isValidNumber should be checked against the formatted number.

This is a quick first draft, will need to update the README.md & add some more tests.

Let me know

[coveralls]

Coverage remained the same at 100.0% when pulling 14e0270 on optii:feature/strict into 9ca9edc on Salesflare:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 514a9fd on optii:feature/strict into 9ca9edc on Salesflare:master.

[iraycd]

Merge this please.

[AdriVanHoudt]

I like the solution! Thanks for this!
If you can add some more test and update the readme I will gladly merge this ✨

[CatGuardian]

How is this coming along @optii? Are we getting close to having this wrapped up?

[optii]

Just pushed some updates, I've updated the test, to use the examples given in issue #57, a bit stuck as to what other test i could possibly add tbh. Added the example to the readme, don't know if how I've done it is what you where expecting ? happy to make changes if you've got any suggestions

[AdriVanHoudt]

Thanks for this!
Released under 3.1.0