Drop RN 0.46 support

lib/android/app/src/main/java/com/reactnativenavigation/react/NavigationPackage.java

 
 import com.facebook.react.ReactNativeHost;
 import com.facebook.react.ReactPackage;
-import com.facebook.react.bridge.JavaScriptModule;
 import com.facebook.react.bridge.NativeModule;
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.uimanager.ViewManager;
 
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
 
 	private ReactNativeHost reactNativeHost;
 
-	public NavigationPackage(final ReactNativeHost reactNativeHost) {
+	@SuppressWarnings("WeakerAccess")
+    public NavigationPackage(final ReactNativeHost reactNativeHost) {
 		this.reactNativeHost = reactNativeHost;
 	}
 
 	@Override
 	public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
-		return Arrays.<NativeModule>asList(
-				new NavigationModule(reactContext, reactNativeHost.getReactInstanceManager())
-		);
-	}
-
-	public List<Class<? extends JavaScriptModule>> createJSModules() {
-		return Collections.emptyList();
+		return Collections.singletonList(new NavigationModule(reactContext, reactNativeHost.getReactInstanceManager()));
 	}
 
 	@Override