Bumped Standards-Version to 4.7.2

• debian/control: bumped Standards-Version to 4.7.0.
• debian/copyright: updated package years.

• debian/control:
  • Added 'Rules-Requires-Root: no' in source stanza.
  • Change Maintainer's email.
  • Change Vcs-* fields for new repository in salsa.
  • Bumped Standards-Version to 4.4.1.
  • Updated DH to level 12.
• debian/copyright:
  • Change Maintainer's email.
  • Updated packaging copyright years.
• debian/salsa-ci.yml: created to start CI tests for Salsa
• debian/tests/conrol: added to perform trivial tests.