Click event propagation

[dev387]

Describe the bug
In our intern application, we have some kind of user inactivity logic which is based on click and touch events. In vue-datepicker library, almost every click event is followed by stop propagation. Maybe there are cases where stop propagation is needed, but I have tried to removing it and it looks that it not break anything. If you want, I can make a PR.

To Reproduce
Steps to reproduce the behavior:

1. Click on whatever on datepicker '....'
2. Click event is not propagated

Expected behavior
Click event is propagated to parent element.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop & mobile (please complete the following information):

• Browser: every browser
• Library version: Probably all versions, but for now let's say 6.0.0

[Jasenkoo]

Initially, it was added here(link to an old repo). I'll probably add a prop to disable these events without the need to remove them completely as it might break existing functionalities with 3rd party libraries, but will see exactly.