Update less version dependency

Author: gilbert

package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-less-endpoint",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "Easily serve LESS css assets on express",
   "main": "index.js",
   "scripts": {
@@ -9,7 +9,7 @@
   "author": "Gilbert <[email protected]>",
   "license": "MIT",
   "dependencies": {
-    "less": "^2.6.1"
+    "less": "2.x"
   },
   "repository": {
     "type": "git",