fix memory font memory leaks iOS

ios/Text/RNSVGGlyphContext.m

@@ -191,7 +191,10 @@
     CTFontDescriptorRef ctfd = (__bridge CTFontDescriptorRef)(uifd);
     CTFontDescriptorRef newfd = CTFontDescriptorCreateCopyWithVariation(ctfd, wght_id, (CGFloat)weight);
     CTFontRef newfont = CTFontCreateCopyWithAttributes(ref, size, nil, newfd);
-    return newfont;
+
+    CFRelease(newfd);
+
+    return (CTFontRef)CFAutorelease(newfont);
 }
 
 - (void)pushIndices

ios/Text/RNSVGTSpan.m

@@ -140,6 +140,9 @@ static CGFloat RNSVGTSpan_radToDeg = 180 / (CGFloat)M_PI;
 TopAlignedLabel *label;
 - (void)drawWrappedText:(CGContextRef)context gc:(RNSVGGlyphContext *)gc rect:(CGRect)rect {
     [self pushGlyphContext];
+    if (fontRef != nil) {
+         CFRelease(fontRef);
+     }
     fontRef = [self getFontFromContext];
     RNSVGFontData* fontdata = [gc getFont];
     CFStringRef string = (__bridge CFStringRef)self.content;