Update year to 2018 (#140)

* Version bump to 1.5.1

* Updated year to 2018

CHANGELOG

+(02 October 2017) Version 1.5.1: Fix for "Execution fail when document contains undefined values" (#136/#137) provided by Gian Marco Gherardi ( @gimmi )
+
 (14 May 2015) Version 1.5.0: Introduced basic plugin infrastructure, 'onConfig' and 'formatResults' hooks
 
 (14 Oct 2014) Version 1.4.1: @todvora's fix for maxDepth (matches readme), and fixes for incorrect counts while using query/limit

README.markdown

@@ -278,4 +278,4 @@ Know of one? Built one? Let us know!
 I have every reason to believe this tool will **not** corrupt your data or harm your computer. But if I were you, I would not use it in a production environment.
 
 
-Released by Maypop Inc, © 2012–2017, under the [MIT License] (http://www.opensource.org/licenses/MIT).
+Released by Maypop Inc, © 2012–2018, under the [MIT License] (http://www.opensource.org/licenses/MIT).

package.json

 {
   "name": "variety",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "A schema analyzer for MongoDB",
   "main": "variety.js",
   "directories": {

variety.js

@@ -7,7 +7,7 @@ finding rare keys.
 
 Please see https://github.com/variety/variety for details.
 
-Released by Maypop Inc, © 2012-2017, under the MIT License. */
+Released by Maypop Inc, © 2012-2018, under the MIT License. */
 
 (function () {
   'use strict'; // wraps everything for which we can use strict mode -JC
@@ -19,7 +19,7 @@ Released by Maypop Inc, © 2012-2017, under the MIT License. */
   };
 
   log('Variety: A MongoDB Schema Analyzer');
-  log('Version 1.5.0, released 14 May 2015');
+  log('Version 1.5.1, released 02 October 2017');
 
   var dbs = [];
   var emptyDbs = [];