🐛 useKeyboard: mark start coordinate as undefined

Since the start coordinate isn't available on android, the start coordinate can be either undefined or ScreenRect

This @types change makes that nuance a bit more clear
DefinitelyTyped/DefinitelyTyped@f6b2d01#diff-e94ad9b79ba4f07235bfefa12c2789cd2d6cb690d9120309555f33ae51295244

Author: GertjanReynaert

src/useKeyboard.ts

@@ -15,7 +15,7 @@ const initialValue = {
 export function useKeyboard() {
   const [shown, setShown] = useState(false)
   const [coordinates, setCoordinates] = useState<{
-    start: ScreenRect
+    start: undefined | ScreenRect
     end: ScreenRect
   }>(initialValue)
   const [keyboardHeight, setKeyboardHeight] = useState<number>(0)