Fixed typo in Config for 3.x JSON (#67)

Sandip Baradiya · hudochenkov · commit fce6b85e4ead · 2017-06-11T12:22:02.000+03:00
Config for `3.x`: json property number padding didn't have had comma which causes an error.
diff --git a/README.md b/README.md
@@ -75,7 +75,7 @@ Config for `3.x`:
 {
 	"properties-order": [
 		"margin",
-		"padding"
+		"padding",
 		"border",
 		"background"
 	]
