Bumps [flask-migrate](https://github.com/miguelgrinberg/flask-migrate) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/miguelgrinberg/flask-migrate/releases)
- [Changelog](https://github.com/miguelgrinberg/Flask-Migrate/blob/master/CHANGELOG.md)
- [Commits](https://github.com/miguelgrinberg/flask-migrate/compare/v2.2.0...v2.2.1

)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Update sqlalchemy to 1.2.10

Update pytest to 3.6.3

Update sqlalchemy to 1.2.9

Update webtest to 2.0.30

Update pytest to 3.6.2

Added Pipfile and updated {{{cookiecutter.app_name}}/README.rst

Update flask-migrate to 2.2.0

Update psycopg2 to 2.7.5

Update flake8-docstrings to 1.3.0

Update sqlalchemy to 1.2.8

Update wtforms to 2.2.1

Update pytest to 3.6.1

Update pytest to 3.6.0

Update pep8-naming to 0.7.0

Update flask to 1.0.2

Update pep8-naming to 0.6.1

Update factory-boy to 2.11.1

Update flake8-quotes to 1.0.0

Update sqlalchemy to 1.2.7