Update copyright notices

Gruntfile.js

@@ -1,7 +1,7 @@
 /*!
  * Bootlint's Gruntfile
  * https://github.com/twbs/bootlint
- * Copyright 2014-2016 The Bootlint Authors
+ * Copyright 2014-2017 The Bootlint Authors
  * Portions Copyright 2013-2014 Twitter, Inc.
  * Licensed under MIT (https://github.com/twbs/bootlint/blob/master/LICENSE)
  */

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2014-2016 The Bootlint Authors
+Copyright (c) 2014-2017 The Bootlint Authors
 
 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

@@ -219,4 +219,4 @@ See the [GitHub Releases page](https://github.com/twbs/bootlint/releases) for de
 
 ## License
 
-Copyright (c) 2014-2016 The Bootlint Authors. Licensed under the MIT License.
+Copyright (c) 2014-2017 The Bootlint Authors. Licensed under the MIT License.

src/bootlint.js

@@ -1,7 +1,7 @@
 /*!
  * Bootlint - an HTML linter for Bootstrap projects
  * https://github.com/twbs/bootlint
- * Copyright (c) 2014-2016 The Bootlint Authors
+ * Copyright (c) 2014-2017 The Bootlint Authors
  * Licensed under the MIT License.
  */