fix stylelint/stylelint#4020 (stylelint#60)

Author: vankop

test/camel-case.js

@@ -17,6 +17,8 @@ const data = {
 	webkitApp: "-webkit-app",
 	onChange: "on-change",
 	OnChange: "-on-change",
+	overflowWrap: "overflow-wrap",
+	overflowX: "overflow-x",
 	zIndex: "z-index",
 	"::selection": "::selection",
 	"::mozSelection": "::-moz-selection",

un-camel-case.js

@@ -1,7 +1,7 @@
 "use strict";
 function unCamelCase (str) {
 	return str.replace(/[\w-]+/g, (s) => (
-		/^[A-Z]?[a-z]*(?:[A-Z][a-z]+)+$/.test(s)
+		/^[A-Z]?[a-z]*(?:[A-Z][a-z]*)+$/.test(s)
 			? s.replace(
 				/[A-Z]/g,
 				s => "-" + s.toLowerCase()