fix callable exists

Author: Nhacsam

lib/utils/callable.js

@@ -22,7 +22,7 @@ Callable.prototype.call = function() {
 };
 
 Callable.prototype.exists = function() {
-  return _.has(this.object, this.method);
+  return _.hasIn(this.object, this.method);
 };
 
 module.exports = Callable;

package.json

@@ -21,7 +21,7 @@
     "commander": "^2.9.0",
     "inquirer": "^0.11.0",
     "liftoff": "^2.2.0",
-    "lodash": "^3.10.1",
+    "lodash": "^4.3",
     "node-version-compare": "^1.0.1"
   },
   "devDependencies": {