Upgrade test packages

Author: UnbounDev

.travis.yml

@@ -1,5 +1,7 @@
 language: node_js
 node_js:
+- '6'
+- '4'
 - '0.12'
 - '0.11'
 - '0.10'

index.js

@@ -123,11 +123,11 @@ function _attachExecMethod(qb) {
    */
   qb.exec = function (options, cb) {
 
-    var _options = _.isFunction(options) ? {} : options
+    var _options = typeof options !== "undefined" && _.isFunction(options) ? {} : options
       , _cb;
 
-    if (!_.has(options, "prepare")) {
-      options.prepare = qb._execPrepare;
+    if (!_.has(_options, "prepare")) {
+      _options.prepare = qb._execPrepare;
     }
 
     if (_.isFunction(options)) {

package.json

@@ -29,8 +29,8 @@
     "chai": "^2.2.0",
     "grunt": "^0.4.5",
     "grunt-contrib-jshint": "^0.11.1",
-    "grunt-mocha-test": "^0.12.7",
-    "mocha": "^2.2.1",
+    "grunt-mocha-test": "^0.13.2",
+    "mocha": "^3.1.2",
     "uuid": "^2.0.1"
   },
   "keywords": [
@@ -40,5 +40,8 @@
     "cassandra",
     "datastax",
     "driver"
-  ]
+  ],
+  "engines": {
+    "node": ">=0.10"
+  }
 }