Fix bottomTabBarOptions (missing unit for partial options)

Author: MoOx

src/BottomTabs.re

@@ -99,7 +99,8 @@ module Make = (M: {type params;}) => {
  ~tabStyle: ReactNative.Style.t=?,
  ~labelPosition: {. "deviceOrientation": string} => string=?,
  ~adaptive: bool=?,
- ~style: ReactNative.Style.t=?
+ ~style: ReactNative.Style.t=?,
+ unit
  ) =>
  bottomTabBarOptions =
  "";