fix: update email regex to support special characters

[grenhall]

What?

It's impossible to create a user with special characters in their email in Payload CMS 3.35.0.

The issue is that currently the regex looks like this:

...payload/packages/payload/src/fields/validations.ts (line 202-203):
const emailRegex = /^(?!...)[\w.%+-]+@a-z0-9?(?:.a-z0-9?).[a-z]{2,}$/i

This allows users that have the following characters in their email to be created:
%, ., +, -

The regex needs to get updated to the following:

const emailRegex = /^(?!...)[\w!#$%&'+/=?^{|}~.-]+@a-z0-9?(?:.a-z0-9?)*.[a-z]{2,}$/i`

This way all special characters `!#$%&'*+/=?^_{|}~.-`` are hereby OK to have in the email.

I've added more test-cases to cover a couple of more scenarios in the forked repo.

Why?

The regex is missing some special characters that are allowed according to standards.

How?

• Go to the admin ui and try to create a user with any of the newly added special characters meaning (!#$%&'*+/=?^_{|}~.-`)
• You should get a validation error. However with the addition of the above code it should all check out.

Fixes #
#12180

[github-actions]

🚀 This is included in version v3.36.1