Arabic translation enhancement: Hide unit count with dual forms.

[6km]

The issue with is described in #221.
I have implemented a solution for it.

• Adds a property to the Arabic humanizer called hideUnitInDualForm that I used to indicate that the language is Arabic.
  

• Adds a new option, which is arabic_hideUnitInDualForm, it works only with Arabic language.
  default: true.
  

I could just check if the language equals ar, but I thought it would be better to add that hideUnitInDualForm property to the humanizer and options!

[EvanHahn]

Thank you! I will take a look soon.

[EvanHahn]

• I don't know much about Arabic. Do you have a place I could learn more about these rules to make sure this is correct for all Arabic speakers?

• Please run npm format to format the code.

• It looks like tests are failing. Could you run npm test to make the tests pass?

[6km]

@EvanHahn Thanks for your review! I'm working work on it!

• I don't know much about Arabic. Do you have a place I could learn more about these rules to make sure this is correct for all Arabic speakers?

I didn't find many English resources talking about the dual nouns (Muthanna) in Arabic, but this can help I guess.
Number: Singular, Dual, Plural Noun in Arabic

A noun that ends with "ين" or "ان" is a dual noun; that's why we never put a number before it.

[EvanHahn]

Thanks! I'll take another look soon.

[EvanHahn]

This was released in [email protected]. Thanks for your contribution!

[6km]

This was released in [email protected]. Thanks for your contribution!

You're welcome!