tox: Bump 'pylint' and 'pylint-django' versions

Signed-off-by: Vasilis Tsiligiannis <acinonyx@openwrt.gr>

db/base/forms.py

@@ -11,12 +11,12 @@ def existing_uuid(value):
     """ensures the UUID is existing and valid"""
     try:
         Transmitter.objects.get(uuid=value)
-    except Transmitter.DoesNotExist:
+    except Transmitter.DoesNotExist as error:
         raise ValidationError(
             _('%(value)s is not a valid uuid'),
             code='invalid',
             params={'value': value},
-        )
+        ) from error
 
 
 class TransmitterModelForm(BSModalModelForm):  # pylint: disable=too-many-ancestors

db/base/models.py

@@ -390,8 +390,8 @@ class TransmitterEntry(models.Model):
     def __str__(self):
         return self.description
 
-    # see https://github.com/PyCQA/pylint-django/issues/94 for why W0221
-    def save(self, *args, **kwargs):  # pylint: disable=W0221
+    # see https://github.com/PyCQA/pylint-django/issues/94
+    def save(self, *args, **kwargs):  # pylint: disable=W0222
         # this assignment is needed to preserve changes made to a Transmitter
         # through the admin UI
         self.id = None  # pylint: disable=C0103, W0201

tox.ini

@@ -5,8 +5,8 @@ envlist = flake8,isort,yapf,pylint,build,pytest,docs
 flake8 = 3.7.9
 isort = 5.7.0
 yapf = 0.30.0
-pylint = 2.4.4
-pylint_django = 2.0.15
+pylint = 2.6.0
+pylint_django = 2.4.2
 sphinx_rtd_theme = 0.4.3
 twine = 3.1.1
 
@@ -45,6 +45,7 @@ deps =
     pylint=={[depversions]pylint}
     pylint-django=={[depversions]pylint_django}
 extras = dev
+setenv = DJANGO_SETTINGS_MODULE = db.settings
 commands = pylint \
     {envsitepackagesdir}/db \
     {envsitepackagesdir}/auth0login