(dist) update version number in index.js

Author: cloudhead

lib/less/index.js

@@ -5,7 +5,7 @@ var path = require('path'),
 require.paths.unshift(path.join(__dirname, '..'));
 
 var less = {
-    version: [1, 0, 30],
+    version: [1, 0, 31],
     Parser: require('less/parser').Parser,
     importer: require('less/parser').importer,
     tree: require('less/tree'),