[feat]GSTIN Number Validation

[digambar-t7]

Hey there,
Every business operating in a state or Union territory in India is assigned a unique Goods and Services Tax Identification Number, popularly known as GSTIN.It is a unique 15 digit identification number assigned to every taxpayer in India.Also it is very essential in the tax collection/filing process in India.
Thus, I propose to add a validator for GST number.

[WikiRik]

Could this become a part of isTaxID with Indian locale?

[digambar-t7]

Yeah absolutely,we can make it a part of isTaxID as you said.I would like to work on it.

[rubiin]

Yeah absolutely,we can make it a part of isTaxID as you said.I would like to work on it.

Go ahead . If you have already started working, you can mention this issue as well so we can track the issue ,the PR is for

[WikiRik]

There was a closed PR a few days back; #2080
Not sure what the plan was for that, so I think a new PR is welcomed

[digambar-t7]

Okay, I'll raise a PR shortly 👍

[Santhosh-Kumar-99]

Hi @pano9000 as mentioned in #2152 , I would love to work on this. I am not able to see any open PR as of now will raise one shortly.

[Santhosh-Kumar-99]

Hi @pano9000 @WikiRik and @rubiin Raised PR #2153 for the above issue please review it and let me know if any changes required.
Thank you