Locale de_DE not supported by fromNow()

[SebRut]

Describe the bug
The result of Jiffy().fromNow(...) is returning the default english texts if the locale is set to 'de_DE'.

To Reproduce

final locale = await findSystemLocale(); //returns 'de_DE'
await Jiffy.locale(locale);

final result = Jiffy().fromNow()

Expected behavior
result should display the relative time in german.

Additional context
I guess this occurs as relative time only checks for 'de`, 'deat' and 'dech', not 'dede'.

[jama5262]

@SebRut Indeed the de_DE is not supported, but as you mentioned in the issue
'de', 'deat' and 'dech' are only checked for relative time like fromNow() and from()

But if you would like de_DE to be supported, you can create a PR and add the locale to Jiffy