Update to a more current version of sendgrid php, e.g. ~5.1

[danielsippel]

Would be nice to be more up to date.

[danielsippel]

As well, it seemed to me that "tystr/sendgrid-bundle": "^0.1.1" required sendgrid~5.1 already.. and was not compatible anymore, because they are using api_key as auth parameter now.

[danielsippel]

#8

[COil]

Sendgrid 6 package is out now. But this bundle seems abandoned.

I think such a bundle should live in the sendgrig organization so we are sure it is updated.