fix defaultProps warning with React 18

Author: nygardk

.changeset/late-chairs-learn.md

@@ -0,0 +1,5 @@
+---
+"react-share": patch
+---
+
+Fixed `createIcon` defaultProps warning with React 18.

src/hocs/createIcon.tsx

@@ -17,11 +17,11 @@ type IconConfig = {
 
 export default function createIcon(iconConfig: IconConfig) {
   const Icon: React.FC<Props> = ({
-    bgStyle,
-    borderRadius,
-    iconFillColor,
-    round,
-    size,
+    bgStyle = {},
+    borderRadius = 0,
+    iconFillColor = 'white',
+    round = false,
+    size = 64,
     ...rest
   }) => (
     <svg viewBox="0 0 64 64" width={size} height={size} {...rest}>
@@ -42,12 +42,5 @@ export default function createIcon(iconConfig: IconConfig) {
     </svg>
   );
 
-  Icon.defaultProps = {
-    bgStyle: {},
-    borderRadius: 0,
-    iconFillColor: 'white',
-    size: 64,
-  };
-
   return Icon;
 }