Copyright for golang-github-dgrijalva-jwt-go source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: jwt-go
Source: https://github.com/dgrijalva/jwt-go

Files: *
Copyright: 2012 Dave Grijalva
License: Expat

Files: debian/*
Copyright: 2015 Tim Potter 
License: Expat
Comment: Debian packaging is licensed under the same terms as upstream

License: Expat
 Copyright (c) 2012 Dave Grijalva
 .
 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:
 .
 The above copyright notice and this permission notice shall be 
 included in all copies or substantial portions of the Software.
 .
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
 OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 
 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.