Copyright for pyannotate source package in Huanghe V3.0

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: pyannotate
Upstream-Contact: Dropbox 
Source: https://github.com/dropbox/pyannotate

Files: *
Copyright: Dropbox 
License: Apache-2.0

Files: debian/*
Copyright: 2020 © Sandro Tosi 
License: Apache-2.0

License: Apache-2.0
 The full text of the licence is at /usr/share/common-licenses/Apache-2.0 .