Update year (#1742)

* Update year on readme

* Update year on license

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2017 Jeremy Thomas
+Copyright (c) 2018 Jeremy Thomas
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -94,4 +94,4 @@ Browse the [online documentation here.](https://bulma.io/documentation/overview/
 
 ## Copyright and license
 
-Code copyright 2017 Jeremy Thomas. Code released under [the MIT license](https://github.com/jgthms/bulma/blob/master/LICENSE).
+Code copyright 2018 Jeremy Thomas. Code released under [the MIT license](https://github.com/jgthms/bulma/blob/master/LICENSE).