Make sure getNumber() works as expected with every ar-* (Arabic) locale that will be supported.

[gkamtzir]

Is your feature request related to a problem? Please describe.
We have to make sure that getNumber() works as expected with every ar-* (Arabic) locale we are about to support.

Describe the solution you'd like
New get-number.ar-*.spec.js files must be created to test thoroughly that getNumber() works as expected with every ar-* locale.

Describe alternatives you've considered
N/A.

Additional context
The tests must include some manual test cases and, then, the needed automatic tests as stated here.

[st3rgios]

Hello @gkamtzir

I would like to try and help with this issue.

So I am kindly asking you to assign this issue to me.

[gkamtzir]

@st3rgios Sure, go ahead!