django.db.migrations.exceptions.MigrationSchemaMissing: Unable to create the django_migrations table ((1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(6) NOT NU
原因：
Django2.1不再支持MySQL5.5，必须5.6版本以上
解决办法：
二选一
（1）Django降级到2.0
pip install Django==2.0.0 -i https://pypi.douban.com/simple
（2）MySQL升级