synchronize with master before push to remote branch

core/migrations/0015_merge_20191005_1957.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.17 on 2019-10-05 12:57
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0014_feedback'),
+        ('core', '0014_company_category'),
+        ('core', '0014_student_region'),
+    ]
+
+    operations = [
+    ]