upgrade to Tryton 6.6

setup.py

@@ -40,7 +40,7 @@ with open(path.join(here, 'versiondep.txt'), encoding='utf-8') as f:
 
 # tryton-version
 major_version = 6
-minor_version = 0
+minor_version = 6
 
 requires = []
 for dep in info.get('depends', []):
@@ -87,6 +87,7 @@ setup(name='%s_%s' % (PREFIX, MODULE),
     'License :: OSI Approved :: GNU General Public License (GPL)',
     'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',
+    'Programming Language :: Python :: 3.9',
     ],
 
     keywords='tryton xrechnung edcoument',

tests/test_edocument.py

@@ -5,7 +5,7 @@
 
 from trytond.tests.test_tryton import ModuleTestCase, with_transaction
 from trytond.pool import Pool
-from trytond.modules.edocument_uncefact.tests.test_edocument_uncefact import get_invoice
+from trytond.modules.edocument_uncefact.tests.test_module import get_invoice
 from unittest.mock import Mock, MagicMock
 from decimal import Decimal
 
@@ -51,3 +51,5 @@ class EdocTestCase(ModuleTestCase):
             fhdl.write(invoice_string.decode('utf8'))
 
 # end EdocTestCase
+
+del ModuleTestCase