statusBarStyle support

lib/ios/RNNNavigationOptions.h

 @property (nonatomic, strong) id orientation;
 @property (nonatomic, strong) NSNumber* statusBarBlur;
 @property (nonatomic, strong) NSNumber* statusBarHideWithTopBar;
+@property (nonatomic, strong) NSString* statusBarStyle;
 @property (nonatomic, strong) NSNumber* popGesture;
 @property (nonatomic, strong) UIImage* backgroundImage;
 @property (nonatomic, strong) UIImage* rootBackgroundImage;

lib/ios/RNNNavigationOptions.m

 -(instancetype)initWithDict:(NSDictionary *)options {
 	self = [super init];
 	self.statusBarHidden = [options objectForKey:@"statusBarHidden"];
+	self.statusBarBlur = [options objectForKey:@"statusBarBlur"];
+	self.statusBarStyle = [options objectForKey:@"statusBarStyle"];
 	self.screenBackgroundColor = [options objectForKey:@"screenBackgroundColor"];
 	self.backButtonTransition = [options objectForKey:@"backButtonTransition"];
 	self.orientation = [options objectForKey:@"orientation"];

lib/ios/RNNRootViewController.m

 	return NO;
 }
 
+- (UIStatusBarStyle)preferredStatusBarStyle {
+	if (self.options.statusBarStyle && [self.options.statusBarStyle isEqualToString:@"light"]) {
+		return UIStatusBarStyleLightContent;
+	} else {
+		return UIStatusBarStyleDefault;
+	}
+}
+
 - (UIInterfaceOrientationMask)supportedInterfaceOrientations {
 	return self.options.supportedOrientations;
 }