Add option to show only start or end date in the DateTime Range custom formatter

Yes you are absolutely right!

This will break on sites using a core version older than 10.3.x so I'll make a new 2.x version of optional_end_date with these changes.

It's primary administrative work on my part, but I still need to find the time to do this.
Hopefully I'll get around to it soon.
I'm unsure of how the merge request works against a new branch, with credits and all. I'll make an update in this issue if I need you to update the merge request to keep credits, maybe it's all done automatically never tried it don't know.

Thanks for the update!
Just let me know if you need help with the MR.

Thank you for the merge

I've created a new v2 branch, updated the core requirements and merged the request.

I'll try to find the time next week to make a v2 release so this gets out there. Thanks again for your code and patience.

Automatically closed - issue fixed for 2 weeks with no activity.