Fix correct waypoints type to be nullish

[hishtadlut]

I was getting build errors saying

Property 'waypoints' is missing in type '{ origin: MarkerOptions; destination: MarkerOptions; }' but required in type '{ origin: 
MarkerOptions; destination: MarkerOptions; waypoints: MarkerOptions; }'.

After checking the docs and the types of the library I found a mismatch.

Library types:

markerOptions: {
      origin: google.maps.MarkerOptions;
      destination: google.maps.MarkerOptions;
      waypoints: google.maps.MarkerOptions;
};

While in the docs

waypoints[] (optional) specifies an array of DirectionsWaypoints. Waypoints alter a route by routing it through the specified location(s). A waypoint is specified as an object literal with fields shown below:

so I just added a question mark to the type.

so now it is:

markerOptions: {
      origin: google.maps.MarkerOptions;
      destination: google.maps.MarkerOptions;
      waypoints**?**: google.maps.MarkerOptions;
};

[explooosion]

Thank you for everything !