phone_number_input has no validation hint/msg

[blankg]

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Description

When using passwordless login with phone_number_input, if user enters illegal chars (for example +444-5555) there is a client side validation using a numbers only regex. The only indication user has is a red line under the input. We got feedbacks from users they could not understand what is wrong.
A simple invalidhint string with something like "invalid phone number. only numbers are allowed" would make a big difference.

Reproduction

In a passwordless login screen just enter a phone number with invalid chars like +5874-4444 or similar

Environment

"auth0-lock": "11.22.2"

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[stevehobbsdev]

Thanks @blankg, let's talk about this on the PR.