Missing days in header when using the gantt chart with a lot of days

[kolaente]

The gantt chart header looks like this for the range in the screenshot:

(The date inputs come from my application)

I'm guessing the days are not shown in the header because there are simply too many which lets them overflow. A previous version of my (very buggy) gantt chart looked like this:

I'd like to implement something similar with this library.

Would you accept a PR to add slots to make these things configurable?

[kolaente]

Maybe related to #11

[zunnzunn]

In Vue-Ganttastic v2, you can configure this using the precision prop, but I would accept a PR for this for v1, too.