fix: correct plugin order for CSS Modules (webpack#534)

Author: OliverJAsh

lib/processCss.js

@@ -159,6 +159,7 @@ module.exports = function processCss(inputSource, inputMap, options, callback) {
 	};
 
 	var pipeline = postcss([
+		modulesValues,
 		localByDefault({
 			mode: options.mode,
 			rewriteUrl: function(global, url) {
@@ -176,7 +177,6 @@ module.exports = function processCss(inputSource, inputMap, options, callback) {
 			}
 		}),
 		extractImports(),
-		modulesValues,
 		modulesScope({
 			generateScopedName: function generateScopedName (exportName) {
 				return customGetLocalIdent(options.loaderContext, localIdentName, exportName, {