Remove VAPIDKeyset.public_key, generate on demand

Also rename `gen_vapid_keys` to `gen_vapid_key`, and merge migrations

djangoldp_webpushnotification/migrations/0001_initial.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.19 on 2021-04-07 14:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='VAPIDKeyset',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('private_key', models.BinaryField(max_length=43)),
+            ],
+        ),
+    ]

djangoldp_webpushnotification/migrations/0012_vapidkeyset.py

@@ -1,19 +0,0 @@
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-	dependencies = [
-		('djangoldp_notification', '0011_auto_20210218_1145'),
-	]
-
-	operations = [
-		migrations.CreateModel(
-			name='VAPIDKeyset',
-			fields=[
-				('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-				('public_key', models.BinaryField(max_length=87)),
-				('private_key', models.BinaryField(max_length=43)),
-			],
-		),
-	]