update copyright year (#715)

Author: aciccarello

README.md

@@ -152,5 +152,5 @@ You can find TypeDoc on GitHub; feel free to start an issue or create a pull req
 ## License
 
 Copyright (c) 2015 [Sebastian Lenz](http://typedoc.org).<br>
-Copyright (c) 2016-2017 [TypeDoc Contributors](https://github.com/TypeStrong/typedoc/graphs/contributors).<br>
+Copyright (c) 2016-2018 [TypeDoc Contributors](https://github.com/TypeStrong/typedoc/graphs/contributors).<br>
 Licensed under the Apache License 2.0.

src/test/renderer/specs/index.html

@@ -193,7 +193,7 @@ <h2 id="contributing">Contributing</h2>
 				<a href="https://github.com/TypeStrong/typedoc">https://github.com/TypeStrong/typedoc</a></p>
 				<h2 id="license">License</h2>
 				<p>Copyright (c) 2015 <a href="http://typedoc.org">Sebastian Lenz</a>.<br>
-					Copyright (c) 2016-2017 <a href="https://github.com/TypeStrong/typedoc/graphs/contributors">TypeDoc Contributors</a>.<br>
+					Copyright (c) 2016-2018 <a href="https://github.com/TypeStrong/typedoc/graphs/contributors">TypeDoc Contributors</a>.<br>
 				Licensed under the Apache License 2.0.</p>
 			</div>
 		</div>