Symfony version(s) affected: 4.4 / 5.1 / 5.2

Description
It is not possible to update to newest 3.0 version (https://github.com/egulias/EmailValidator/releases/tag/3.0.0) because symfony/mailer has constraint for using ^2.1.10 version.

How to reproduce
Create project with composer.json

"egulias/email-validator": "^3.0",
"symfony/mailer": "^5.2",

Possible Solution
Modify symfony/mailer composer.json for allow ^2.1.10|^3.0 or >=2.1.10

Additional context
At first look, there is no BC-BREAK changes.

Ready to make PR.