update docs

docs/api/ComponentRegistry.md

 
 ## registerComponent
 
-`registerComponent(componentName: string, getComponentClassFunc: ComponentProvider): React.ComponentType<any>`
+`registerComponent(componentName: string, getComponentClassFunc: ComponentProvider): void`
 
-[source](https://github.com/wix/react-native-navigation/blob/v2/lib/src/components/ComponentRegistry.ts#L12)
+[source](https://github.com/wix/react-native-navigation/blob/v2/lib/src/components/ComponentRegistry.ts#L11)
 
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