docs(licence): update licence dates

cubicweb_seda/views/export.py

-# copyright 2015-2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2015-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/facets.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/jqtree.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/mgmt_rules.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/patches.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/sedalib.py

-# copyright 2015 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2015-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/sedatree.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/simplified.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/uicfg.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/viewlib.py

-# copyright 2016-2017 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/views/widgets.py

-# copyright 2015-2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2015-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/xsd.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/xsd2concepts.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/xsd2entities.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/xsd2uicfg.py

-# copyright 2016-2017 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

cubicweb_seda/xsd2yams.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

setup.py

 #!/usr/bin/env python
 # pylint: disable=W0142,W0403,W0404,W0613,W0622,W0622,W0704,R0904,C0103,E0611
 #
-# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2003-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
 #
 # This file is part of CubicWeb.

test/test_dataimport.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

test/test_diag.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under

test/test_entities.py

-# copyright 2016 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+# copyright 2016-2021 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
 # contact http://www.logilab.fr -- mailto:contact@logilab.fr
 #
 # This program is free software: you can redistribute it and/or modify it under