Add goToDate() method

[pdpino]

Add method to navigate to a specific date, fixes #54

Notes:

• This is a breaking change (to move to a date). Maybe we could create a changelog documenting this?
• There is a slight hack with the setTimeout(..., 0) method. This is needed so the child VirtualizedList gets updated first, and only then the this.eventsGrid.scrollToIndex() gets called.
  • If the this.eventsGrid.scrollToIndex() function is called first, the new pages are not rendered yet
  • I could not make it work with other callback managers, such as InteractionsManager.runAfterInteractions
• The code got a little messy, if you have any suggestions to improve it let me know!

[hoangnm]

Hi @pdpino , sorry for the late response. I agree that the code looks a bit messy, but I couldn't find a better suggestion. Let's merge this first and we can improve later. Thanks a lot!