Add support for commas and semicolons in email name and add test

[qligier]

This PR fixes issue #368 and replaces #370. It wraps the email name in double quotes when commas or semicolons are present (without, the mail would be rejected by the API).

I've added unit test to check the behavior of the Sendgrid\Email->setName() method. I've also sent real emails with various names to verify that they are delivered.

I've also added a comment explaining the issue because the patch should be reverted if the API is modified to support commas and semicolons.

[SendGridDX]

All committers have signed the CLA.

[thinkingserious]

@qligier

We have not been able to merge your Pull Request, but because you are awesome - we wanted to make sure you could still get a SendGrid Hacktoberfest shirt.

Please go fill out our swag form before Nov 5th and we will send the shirt! (We know that you might have tried this before and it didn’t work, sorry about that!)

You have till Nov 5th to fill out this form in order to get the Hacktoberfest shirt!

Thank you for contributing during Hacktoberfest! We hope to see you in the repos soon! Just so you know, we always give away a SendGrid shirt for your first ever non-Hacktoberfest PR that gets merged.

[qligier]

Hey,
Thanks for the shirt!
Why haven't you been able to merge it? Does it require some changes?

[thinkingserious]

Hello @qligier,

I'm not sure if your PR will require any changes just yet. We are processing all of the PRs from oldest to newest and we had over 1,000 PRs this hacktoberfest, so we are a bit (OK, a lot) behind :)

Thank you for your contribution and patience!

With Best Regards,

Elmer

[ssiddhantsharma]

This test really lives up, and performs the job well.

[thinkingserious]

Hello @qligier,

Could you please resolve the conflicts so that I can merge this? Thanks!

[qligier]

It's done. There is an issue with composer when using PHP 7 but tests have passed with PHP 5.6 in Travis CI.

[thinkingserious]

Hello @qligier,

Thanks again for the PR!

We appreciate your contribution and look forward to continued collaboration. Thanks!

Team SendGrid DX