fix(eslint): resolve import/no-extraneous-dependencies errors

Author: Hans Kristian Flaatten

examples/app.js

@@ -1,3 +1,4 @@
+/* eslint import/no-extraneous-dependencies: ["error", {"devDependencies": true}] */
 'use strict';
 
 const express = require('express');

examples/db.js

@@ -1,3 +1,4 @@
+/* eslint import/no-extraneous-dependencies: ["error", {"devDependencies": true}] */
 'use strict';
 
 const EventEmitter = require('events').EventEmitter;

examples/test.js

@@ -1,3 +1,4 @@
+/* eslint import/no-extraneous-dependencies: ["error", {"devDependencies": true}] */
 'use strict';
 
 const assert = require('assert');

test.js

@@ -4,7 +4,7 @@ const assert = require('assert');
 const MongoQS = require('./');
 
 const querystring = require('querystring');
-const qs = require('qs');
+const qs = require('qs'); // eslint-disable-line import/no-extraneous-dependencies
 
 let mqs = null;
 let query = null;