Xcode 12.5 produces warnings about missing imports in umbrella header FSCalendar.h when using FSCalendar via SPM.
In our project, we treat swift warnings as errors for releases. Therefore our build pipeline won't succeed.

The following screenshot shows the errors produced by Xcode:

It looks like not all of the header files linked in the include directory, need to be public, but only the ones already imported in FSCalendar.h.

I'll create a pull request. Please have a look.