docs(licence): update licence dates

cubicweb_seda/__init__.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/dataimport.py

 # coding: utf-8
-# 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/entities/__init__.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/entities/custom.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/entities/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

cubicweb_seda/entities/generated.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/entities/html_generation.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/entities/itree.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/entities/profile_generation.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/hooks.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/migration/postcreate.py

 # coding: utf-8
-# 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/schema/__init__.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/schema/seda2.py

@@ -4,7 +4,7 @@
 # XXX unsupported merge because of incompatible cardinality SEDAArchiveUnitRefId seda_archive_unit_ref_id_to SEDAArchiveUnit ? <SEDAArchiveUnitRefId seda_archive_unit_ref_id_to set(['SEDAArchiveUnit'])> ?*
 # XXX unsupported merge because of incompatible cardinality SEDAArchiveUnitRefId seda_archive_unit_ref_id_to SEDAArchiveUnit ? <SEDAArchiveUnitRefId seda_archive_unit_ref_id_to set(['SEDAArchiveUnit'])> ?*
 # XXX unsupported merge because of incompatible cardinality SEDAArchiveUnitRefId seda_archive_unit_ref_id_to SEDAArchiveUnit ? <SEDAArchiveUnitRefId seda_archive_unit_ref_id_to set(['SEDAArchiveUnit'])> ?*
-# 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/site_cubicweb.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/testutils.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/__init__.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/archivetransfer.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/archiveunit.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/clone.py

-# copyright 2015-2017 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/dataobject.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