Remove egulias/email-validator dependency

[alexsegura]

When using this bundle, we can't use egulias/email-validator at version 3.x

However, Symfony allows it

https://github.com/symfony/validator/blob/7474c6839fb9386e98afc478047500e90230fe83/composer.json#L45

[core23]

Thanks for your PR @alexsegura

I wonder why this is a required lib for this bundle. IMHO you can completely remove the dependency.

[alexsegura]

It's needed when using the Email constraint with mode = strict.

So yes, it seems we can remove it, as this bundle is not using the strict mode (or I didn't find it)

NucleosProfileBundle/src/Resources/config/validation.xml

Lines 17 to 33 in c3bb64d

	<property name="email">
	<constraint name="NotBlank">
	<option name="message">nucleos_user.email.blank</option>
	<option name="groups"/>
	</constraint>
	<constraint name="Length">
	<option name="min">2</option>
	<option name="minMessage">nucleos_user.email.short</option>
	<option name="max">180</option>
	<option name="maxMessage">nucleos_user.email.long</option>
	<option name="groups"/>
	</constraint>
	<constraint name="Email">
	<option name="message">nucleos_user.email.invalid</option>
	<option name="groups"/>
	</constraint>
	</property>

[core23]

Thanks @alexsegura