version bumps and migration to django 2.2

karma/migrations/0001_initial.py

@@ -23,7 +23,7 @@ class Migration(migrations.Migration):
                 ('delta', models.SmallIntegerField()),
                 ('nickmask', models.CharField(default='', max_length=200, blank=True)),
                 ('created', models.DateTimeField(auto_now_add=True)),
-                ('key', models.ForeignKey(to='karma.KarmaKey')),
+                ('key', models.ForeignKey(to='karma.KarmaKey', on_delete=models.CASCADE)),
             ],
         ),
     ]

karma/models.py

@@ -115,7 +115,7 @@ class KarmaLogEntryManager(models.Manager):
 class KarmaLogEntry(models.Model):
     """Track each karma increment/decrement."""
 
-    key = models.ForeignKey('KarmaKey')
+    key = models.ForeignKey('KarmaKey', on_delete=models.CASCADE)
     delta = models.SmallIntegerField()
     nickmask = models.CharField(max_length=200, default='', blank=True)
     created = models.DateTimeField(auto_now_add=True)