Type error in region "setOptions" function

[jaredgei]

Bug description

The typescript type for region.setOptions requires "start" to be specified, even though there is specific code to handle "start" being undefined.

Minimal code snippet

region.setOptions({ color: getColor(word) });
doesn't work ^

region.setOptions({ color: getColor(word), start: region.start });
works ^

Obtained result

  Property 'start' is missing in type '{ color: string; }' but required in type 'Omit<RegionParams, "minLength" | "maxLength">'.ts(2345)```

[katspaugh]

Thanks! We should probably add it to the omitted prop list.