message: Update README on supported iOS version
diff: @@ -232,11 +232,12 @@ creating the swap chain in the `onNativeWindowChanged()` callback.
  ### iOS
  -See `ios/samples` for examples of using Filament on iOS.
  +Filament is supported on iOS 12.0 and above. See `ios/samples` for examples of using Filament on
  +iOS.
  Filament on iOS is largely the same as native rendering with C++. A `CAEAGLLayer` or `CAMetalLayer`
  -is passed to the `createSwapChain` method. Filament for iOS supports both OpenGL ES and Vulkan via
  -MoltenVK.
  +is passed to the `createSwapChain` method. Filament for iOS supports both Metal (preferred) and
  +OpenGL ES.
  ## Assets
  