fix(package): update less to version 3.5.3

Closes #44

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
     "github-api": "^3.0.0",
     "instagram-node": "^0.5.7",
     "lastfm": "^0.9.2",
-    "less": "^2.5.1",
+    "less": "^3.5.3",
     "lodash": "^4.3.0",
     "lusca": "^1.3.0",
     "method-override": "^2.3.5",