Support for deepl formality option

[Megafry]

Thank you for this great Extension.
My client asked me if i can set the option "formality" to "more". API-Doc

Unfortunately there are no settings for this, can you add this to the next version?

[ayacoo]

@Megafry Could you give us some feedback about this patch?

Is it clear enough where to set the settings? Does the patch work for you or your client?

[ayacoo]

Hint: PR #33 is the right one :-)

[NairCoder]

Hello @Megafry
Since the option is added into master v2.0.0, closing the issue now.
A shoutout to @ayacoo. Thanks for your support. 👍

[Megafry]

Hello @NairCoder and @ayacoo
Works like a charm, thank you for the work