BottomTab iconsInsets support

lib/ios/RNNBottomTabOptions.h

@@ -8,5 +8,6 @@
 @property (nonatomic, strong) NSString* testID;
 @property (nonatomic, strong) NSNumber* visible;
 @property (nonatomic, strong) NSDictionary* icon;
+@property (nonatomic, strong) NSDictionary* iconInsets;
 
 @end

lib/ios/RNNBottomTabOptions.m

@@ -13,8 +13,23 @@
 
 - (void)applyOn:(UIViewController *)viewController {
 	if (self.title || self.icon) {
-		UITabBarItem* tabItem = [[UITabBarItem alloc] initWithTitle:self.title image:[RCTConvert UIImage:self.icon] tag:self.tag];
+		UITabBarItem* tabItem = [[UITabBarItem alloc] initWithTitle:nil image:[RCTConvert UIImage:self.icon] tag:self.tag];
 		tabItem.accessibilityIdentifier = self.testID;
+		
+		if (self.iconInsets && ![self.iconInsets isKindOfClass:[NSNull class]]) {
+			id topInset = self.iconInsets[@"top"];
+			id leftInset = self.iconInsets[@"left"];
+			id bottomInset = self.iconInsets[@"bottom"];
+			id rightInset = self.iconInsets[@"right"];
+			
+			CGFloat top = topInset != (id)[NSNull null] ? [RCTConvert CGFloat:topInset] : 0;
+			CGFloat left = topInset != (id)[NSNull null] ? [RCTConvert CGFloat:leftInset] : 0;
+			CGFloat bottom = topInset != (id)[NSNull null] ? [RCTConvert CGFloat:bottomInset] : 0;
+			CGFloat right = topInset != (id)[NSNull null] ? [RCTConvert CGFloat:rightInset] : 0;
+			
+			tabItem.imageInsets = UIEdgeInsetsMake(top, left, bottom, right);
+		}
+		
 		[viewController.navigationController setTabBarItem:tabItem];
 	}
 	
@@ -43,6 +58,7 @@
 	self.visible = nil;
 	self.icon = nil;
 	self.testID = nil;
+	self.iconInsets = nil;
 }
 
 @end