startGroup field in Sections

[azs0309]

This library uses a the webhook api and connector card format. When requesting new functionality, please reference the API to ensure this is possible.

• How to add connectors in Microsoft Teams
• Actionable Message Card Reference

Can we please have StartGroup field under the section as given in https://docs.microsoft.com/en-us/outlook/actionable-messages/message-card-reference#section-fields

Thanks

[CommonCrisis]

See https://github.com/rveachkc/pymsteams/compare/master...CommonCrisis:patch-1

See docs: https://docs.microsoft.com/en-us/outlook/actionable-messages/message-card-reference#section-fields

[rveachkc]

@CommonCrisis, this looks like a pretty simple change.

If you'd like to include this in the readme, and submit a pull request, I should be able to include it in a release pretty quickly.