Replace Pelago/Emogrifier to InlineStyle

[bezumkin]

What does it do?

Replaces Pelago/Emogrifier to InlineStyle

Why is it needed?

While Emogrifier block us from use PHP 7.4 we need to replace it

Related issue(s)/PR(s)

#14899

[JoshuaLuckers]

Is it wise to introduce a new dependency that looks unmaintained?

[bezumkin]

@JoshuaLuckers I don't think that this dependency should be maintained actively.
I mean, what could be new for parsing CSS from one tag and putting it inline to another tags?

Anyway, we have other option - just to remove this function from core.

[alroniks]

@JoshuaLuckers I think there is an example of an advantage using a composer when another one can easily replace one tool.

[Jako]

Switching to a probably unmaintained but working repository is IMHO a straightforward solution. If the code changes to switch to that dependency are that minimal, I am fine with the solution.

Using an active repository of maintainers, that don't have understand the version constraint rules of composer, should be avoided. All the badges in the MyIntervals/emogrifier repository don't hide this strange composer rules.