Changed changelog and copyright file.

debian/changelog

-node-is-error (2.2.1-1) UNRELEASED; urgency=low
+node-is-error (2.2.1-1) experimental; urgency=low
 
   * Initial release (Closes: #850124)
 

debian/copyright

@@ -4,7 +4,7 @@ Upstream-Contact: https://github.com/mk-pmb/is-error-js/issues
 Source: https://github.com/mk-pmb/is-error-js
 
 Files: *
-Copyright: 2017 Raynos <raynos2@gmail.com>
+Copyright: Raynos <raynos2@gmail.com>
 License: Expat
 
 Files: debian/*