feat(util): add method to make dynamic scopes name

dynamic scopes are like macros to query builder

lib/util.js

@@ -114,6 +114,20 @@ util.makeSetterName = function (name) {
   return `set${i.camelize(i.underscore(name))}`
 }
 
+/**
+ * makes a dynamic scope method for a given name
+ *
+ * @method makeScopeMethodName
+ *
+ * @param  {String}            name
+ * @return {String}
+ *
+ * @public
+ */
+util.makeScopeMethodName = function (name) {
+  return `scope${i.camelize(name)}`
+}
+
 /**
  * map values for a given key and returns
  * the transformed array with that key only