message: doc: update migration guide
diff: @@ -55,30 +55,17 @@ Now only `EntityDescription` depends on `react-dom`.
  PropType is no longer used. TypeScript is recommended.
  -### Renamed: properties
  +### Renamed / Decrepated: properties
  -The following properties are renamed.
  +See [CHANGELOG](https://github.com/darwin-education/resium/tree/master/CHANGELOG.md).
  -- **Entity**: `onSelectedEntityChanged` => `onSelectedEntityChange`
  -- **Entity**: `onTrackedEntityChanged` => `onTrackedEntityChange`
  -- **Scene**: `morph` => `morphDuration`
  -- **CzmlDataSource**: `czml` => `data` (integrated into data prop)
  -- **CzmlDataSource**: `url` => `data` (integrated into data prop)
  -- **GeoJsonDataSource**: `url` => `data` (integrated into data prop)
  -- **KmlDataSource**: `url` => `data` (integrated into data prop)
  -- **Camera**: `onChanged` => `onChange`
  +#### `url` or `czml` prop of Kml/Czml/GeoJsonDataSource
  -### Decrepated: properties
  +They have been integrated to `data` prop. Now `data` prop accepts URL string, Cesium.Resouce, and data object.
  -The following properties are decrepated.
  +#### `onMount`, `onUpdate` and `onUnmount` prop
  -- All: `onMount`, `onUpdate` and `onUnmount`
  -- **GeoJsonDataSource**: `onProgress`
  -- **CzmlDataSource**: `onProgress`
  -- **KmlDataSource**: `onProgress` and `query`
  -- **Camera**: `view` and `viewBoundingSphere`
  -
  -`onMount`, `onUpdate` and `onUnmount` have been deprecated as they violate React's custom. Use `ref` prop instead.
  +`onMount`, `onUpdate` and `onUnmount` prop have been deprecated as they violate React's custom. Use `ref` prop instead.
  Before:
  