Update version of Node.js and development dependencies in package.json

The new versions are the ones I test with.

package.json

@@ -15,11 +15,11 @@
     "url":  "http://github.com/dmajda/pegjs.git"
   },
   "devDependencies": {
-    "jake":      ">= 0.1.10",
-    "uglify-js": ">= 0.0.5",
-    "jshint":    ">= 0.3.1"
+    "jake":      ">= 0.1.22",
+    "uglify-js": ">= 1.2.4",
+    "jshint":    ">= 0.5.5"
   },
   "engines": {
-    "node": ">= 0.4.4"
+    "node": ">= 0.6.6"
   }
 }