feat: add age formatter

[seb-jean]

I add age formatter

Examples:

{# with filter: #}
Age: {{ user.birthdate|age }} <!-- Age: 30 years old -->

{# ... or use the equivalent function: #}
Age: {{ age(user.birthdate) }} <!-- Age: 30 years old -->

[weaverryan]

Hi!

This is a nice PR - but does it solve a complex enough problem to be in the library? I'm not sure...

[weaverryan]

Ha! Ok, now I see #190 - (I'm reading my notifications in reverse). Ok then - could you rebase for the translation conflict?

[seb-jean]

Ha! Ok, now I see #190 - (I'm reading my notifications in reverse). Ok then - could you rebase for the translation conflict?

@weaverryan, no problem 😄 ! It is resolved.

[weaverryan]

Thanks @seb-jean! Now we have yet MORE translations to collect from languages /cc @kbond

[seb-jean]

Hi @weaverryan and @kbond ,
Do you think it is possible to publish a new release with age formatter.
Thank you :)