Bug#843021: 1.7.0 is out

[Paolo Greppi <paolo.greppi@libpf.com>]

W.r.t. the previous time I looked (version 1.6.0) the dependencies have not changed much:
- Upgraded: 
  - tar-fs: 1.15.1 -> 1.16.0
  - tar-stream: 1.5.2 -> 1.6.0
  - v8-compile-cache: 1.1.0 -> 2.0.0
  - validate-npm-package-license: 3.0.1 -> 3.0.3
- Changed: 
  - deepequal -> deep-equal see https://github.com/yarnpkg/yarn/pull/5742
- New:
  - npm-logical-tree 1.2.1

While for the build dependencies:
- New:
  - git-release-notes 3.0.0 (we can skip)
- Upgraded:
  - jest: 22.4.3 -> 22.4.4 (we can skip)

For up-to-date info on the packaging process see this wiki page on salsa:
https://salsa.debian.org/js-team/node-yarnpkg/wikis/home

Paolo