Add *.tcn file extension

[maximishchenko]

Hello. Thanks for your extension. Can you add support for tcn file extensions?

[github-actions]

Hello and welcome! Thanks for creating your first issue! Someone from our community will get back to you soon!

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity.

[Msobas2]

see pull request #72 as it will enable

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity.

[mikecentola]

Thank you! Will add