Update django-anymail to 0.10

[pyup-bot]

There's a new version of django-anymail available.
You are currently using 0.9. I have updated it to 0.10

These links might come in handy: PyPI | Changelog | Repo

Changelog

0.10

New features

• Mailgun, SparkPost: Support multiple from addresses, as a comma-separated from_email string. (Not a list of strings, like the recipient fields.) RFC-5322 allows multiple from email addresses, and these two ESPs support it. Though as a practical matter, multiple from emails are either ignored or treated as a spam signal by receiving mail handlers. (See 60.)

Other changes

• Fix crash sending forwarded email messages as attachments. (See 59.)
• Mailgun: Fix webhook crash on bounces from some receiving mail handlers. (See 62.)
• Improve recipient-parsing error messages and consistency with Django's SMTP backend. In particular, Django (and now Anymail) allows multiple, comma-separated email addresses in a single recipient string.

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[mention-bot]

@pyup-bot, thanks for your PR! By analyzing the history of the files in this pull request, we identified @ad-m to be a potential reviewer.

[coveralls]

Coverage remained the same at 82.541% when pulling 083be25 on pyup-update-django-anymail-0.9-to-0.10 into 219a9ac on master.

[pyup-bot]

Closing this in favor of #115