Reflexion color dayanimation background

[bilalesi]

change the single quote to double quote for consistency for daySelectionAnimation properties
in the background interface

[peacechen]

@bilalesi Does this replace PR #244 ? I made some comments on that PR that should be addressed before it can be merged. There's now a conflict in index.d.ts. I recommend that you pull the latest from the main branch here and sync up with recent changes.

[peacechen]

@bilalesi Would you mind resolving the conflicts in index.d.ts ?

The Readme also needs to be updated to document the new key for the daySelectionAnimation prop.
https://github.com/BugiDev/react-native-calendar-strip#day-selection-animation-options