Copyright for golang-github-mitchellh-go-testing-interface source package in Experimental

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: go-testing-interface
Source: https://github.com/mitchellh/go-testing-interface
Files-Excluded:
  Godeps/_workspace

Files: *
Copyright: 2016 Mitchell Hashimoto
License: Expat

Files: debian/*
Copyright:
    2018-2019 Dmitry Smirnov 
License: Expat

License: Expat
 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
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 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 .
 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
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 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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