Fix font PropTypes

lib/extract/extractText.js

@@ -44,33 +44,37 @@ function parseFontString(font) {
 
 export function extractFont(props) {
     const {
-        letterSpacing,
-        wordSpacing,
-        fontWeight,
         fontStyle,
-        kerning,
+        fontVariant,
+        fontWeight,
+        fontStretch,
         textAnchor,
         textDecoration,
+        letterSpacing,
+        wordSpacing,
+        kerning,
     } = props;
     let {
-        font,
         fontSize,
         fontFamily,
+        font,
     } = props;
 
     fontFamily = extractSingleFontFamily(fontFamily);
     fontSize = fontSize ?  '' + fontSize : null;
 
     const ownedFont = _.pickBy({
-        fontFamily,
-        letterSpacing,
-        wordSpacing,
-        fontWeight,
         fontStyle,
+        fontVariant,
+        fontWeight,
+        fontStretch,
         fontSize,
-        kerning,
+        fontFamily,
         textAnchor,
         textDecoration,
+        letterSpacing,
+        wordSpacing,
+        kerning,
     }, prop => !_.isNil(prop));
 
     if (typeof font === 'string') {