Fix test suite migrations to match django-taggit 1.3.0

setup.py

@@ -61,6 +61,10 @@ testing_extras = [
 
     # Pipenv hack to fix broken dependency causing CircleCI failures
     'docutils==0.15',
+
+    # django-taggit 1.3.0 made changes to verbose_name which affect migrations;
+    # the test suite migrations correspond to >=1.3.0
+    'django-taggit>=1.3.0,<2.0',
 ]
 
 # Documentation dependencies

wagtail/tests/testapp/migrations/0051_tag_verbose_name.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.0.6 on 2020-05-26 09:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tests', '0050_customimagewithauthor_customrenditionwithauthor'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='restauranttag',
+            name='name',
+            field=models.CharField(max_length=100, unique=True, verbose_name='name'),
+        ),
+        migrations.AlterField(
+            model_name='restauranttag',
+            name='slug',
+            field=models.SlugField(max_length=100, unique=True, verbose_name='slug'),
+        ),
+    ]