[TwigComponent] Convert camelCase attributes to dashed attributes

[ker0x]

Q	A
Bug fix?	yes
New feature?	no
Tickets	Fix #874
License	MIT

This PR convert camelCase attributes to dashed attributes!

The following HTML Twig component syntax

<twig:Button dataModalTarget="modal" dataModalToggle="modal">Open</twig:Button>

will be render as

<button data-modal-target="modal" data-modal-toggle="modal">Open</button>

[kbond]

Is it possibly someone might want to use camel case attributes? Maybe it would be better to parse kebab case attributes correctly?

[weaverryan]

Yea, my instinct is to not do any normalization. If using data-dash-style isn’t being parsed correctly, let’s fix that. Or do you have a compelling argument @ker0x ?

[ker0x]

@weaverryan I have no arguments against, indeed if we can fix parsing it would be better.

[ker0x]

@weaverryan I'm closing the PR because it has been corrected in 2.8.1 through #837 and #848