update copyright date

Author: vince

demo/index.html

@@ -45,7 +45,7 @@ <h2>It all starts with <code>npm install adjs</code>.</h2>
     <footer>
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-      <small>Copyright &copy; 2018 Econify, LLC. All Rights Reserved.</small>
+      <small>Copyright &copy; 2018-2019 Econify, LLC. All Rights Reserved.</small>
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