Added stackbuilders in the list

[vaibhav-009]

Thanks for contributing to the Hacktoberfest Swag List 😃 🎉! Before submitting your pull request, please check off as many of the items below as you can:

1. I have read the Contributing.md file and formatted this PR correctly
2. I'm not adding a company from the blocklist
3. I make sure to fix things promptly if an error or suggestion comes up

Thanks and Happy Hacktoberfest! 🎉
Tagging @crweiner to take a look. 👀

Fixes #773

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[crweiner]

Hi @vaibhav-009! Thank you for your PR!

It looks like Stackbuilders has a few more requirements from this Guidelines & Evaluation Criteria PDF file. Can you please make sure that the Requirements section of the list reflects what the PDF says?

Thanks!

[vaibhav-009]

@crweiner updated the requirements for stack builder

[codeclimate]

Code Climate has analyzed commit b2641fe and detected 0 issues on this pull request.

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[crweiner]

Hi @vaibhav-009! Thank you for adding Stack Builders to the Hacktoberfest Swag List! I appreciate you making the changes I brought up as well. Have a great Hacktoberfest! 🎉 🎃