make it possible to use uscan for getting new releases

Upstream has tags again and Debian tools nowadays can
automatically remove and repack non-dfsg archives using
the machine parsable copyright file. This simplifies
the update process :)
Status Job ID Name Coverage
  Test
manual #122578
allowed to fail manual
phpmd
manual #122580
allowed to fail manual
phpunit_basic
manual #122581
allowed to fail manual
phpunit_functional
manual #122579
allowed to fail manual
schema