Update copyright year

LICENSE

@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2007-2017 Steven Levithan <http://xregexp.com/>
+Copyright (c) 2007-present Steven Levithan <http://xregexp.com/>
 
 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

@@ -230,7 +230,7 @@ require({paths: {xregexp: 'xregexp-all'}}, ['xregexp'], (XRegExp) => {
 
 ## About
 
-XRegExp copyright 2007-2017 by [Steven Levithan](http://stevenlevithan.com/). Unicode data generators by [Mathias Bynens](http://mathiasbynens.be/), adapted from [unicode-data](http://git.io/unicode). XRegExp's syntax extensions and flags come from [Perl](http://www.perl.org/), [.NET](http://www.microsoft.com/net), etc.
+XRegExp copyright 2007-present by [Steven Levithan](http://stevenlevithan.com/). Unicode data generators by [Mathias Bynens](http://mathiasbynens.be/), adapted from [unicode-data](http://git.io/unicode). XRegExp's syntax extensions and flags come from [Perl](http://www.perl.org/), [.NET](http://www.microsoft.com/net), etc.
 
 All code, including addons, tools, and tests, is released under the terms of the [MIT License](http://mit-license.org/).
 

src/addons/build.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp.build 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2012-2017 MIT License
+ * Steven Levithan (c) 2012-present MIT License
  */
 
 export default (XRegExp) => {

src/addons/matchrecursive.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp.matchRecursive 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2009-2017 MIT License
+ * Steven Levithan (c) 2009-present MIT License
  */
 
 export default (XRegExp) => {

src/addons/unicode-base.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp Unicode Base 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2008-2017 MIT License
+ * Steven Levithan (c) 2008-present MIT License
  */
 
 export default (XRegExp) => {

src/addons/unicode-blocks.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp Unicode Blocks 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2010-2017 MIT License
+ * Steven Levithan (c) 2010-present MIT License
  * Unicode data by Mathias Bynens <mathiasbynens.be>
  */
 

src/addons/unicode-scripts.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp Unicode Scripts 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2010-2017 MIT License
+ * Steven Levithan (c) 2010-present MIT License
  * Unicode data by Mathias Bynens <mathiasbynens.be>
  */
 

src/xregexp.js

@@ -1,7 +1,7 @@
 /*!
  * XRegExp 4.0.0
  * <xregexp.com>
- * Steven Levithan (c) 2007-2017 MIT License
+ * Steven Levithan (c) 2007-present MIT License
  */
 
 /**