Refresh the automatically detected licensing information

Signed-off-by: Apertis CI robot <noreply+not_a_robot@apertis.org>

debian/apertis/copyright

+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+
+Files: *
+Copyright: 2013-2017, Berker Peksag
+ 2012-2017, Patrick Maupin
+ 2008, Armin Ronacher
+License: BSD-3-clause
+
+Files: PKG-INFO
+ README.rst
+Copyright: no-info-found
+License: BSD-3-clause
+
+Files: astor.egg-info/*
+Copyright: no-info-found
+License: BSD-3-clause
+
+Files: astor/*
+Copyright: 2013-2015, Berker Peksag
+ 2012-2015, Patrick Maupin
+License: BSD-3-clause
+
+Files: astor/code_gen.py
+Copyright: 2013-2017, Berker Peksag
+ 2012-2017, Patrick Maupin
+ 2008, Armin Ronacher
+License: BSD-3-clause
+
+Files: astor/op_util.py
+ astor/rtrip.py
+ astor/source_repr.py
+ astor/string_repr.py
+Copyright: 2015, 2017, Patrick Maupin
+License: BSD-3-clause
+
+Files: debian/*
+Copyright: 2014 Tianon Gravi <admwiggin@gmail.com>
+License: BSD-3-clause
+
+Files: tests/*
+Copyright: 2015, 2017, Patrick Maupin
+License: BSD-3-clause
+
+Files: tests/test_code_gen.py
+ tests/test_optional.py
+Copyright: 2015, 2017, Patrick Maupin
+ 2014, Berker Peksag
+License: BSD-3-clause
+