Update readme

Author: janicduplessis

README.md

@@ -51,13 +51,14 @@ See the [example app](./example/src/SimpleExample.tsx) for full usage details.
 
 #### `snapPoints`
 
-**Required**
 ```ts
 Array<string | number>
 ```
 
 Points for the bottom sheet to snap to, points should be sorted from bottom to top. It accepts array of number and string.
 
+Defaults to `['66%']`.
+
 #### Other options
 
 Most props from bottom sheet are exposed as navigation options. See the [@gorhom/bottom-sheet website](https://gorhom.github.io/react-native-bottom-sheet/props) for full documentation.