Update 3rd party library 'args' to latest version (7bf1700) (#215)

third-party/args/LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2016 Taylor C. Richberger <taywee@gmx.com>
+Copyright (c) 2016-2017 Taylor C. Richberger <taywee@gmx.com> and Pavel Belikov
 
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: