Pin flask-migrate to latest version 2.2.1

[pyup-bot]

This PR pins Flask-Migrate to the latest release 2.2.1.

Changelog

2.2.0

- Suppress stack traces on command errors (204)

2.1.1

- Make the `directory` argument to `get_config()` optional (168)

2.1.0

- Removed dependency on Flask-Script from setup.py (165)

2.0.4

- Support -x arguments in "migrate" command (148)

2.0.3

- Support multiple -x arguments in the Flask-Script interface (103)

2.0.2

- Support passing alembic context kwargs from constructor into init_app (138)

2.0.1

- Fix flake8 warnings in Alembic templates (136)

2.0.0

- Added Travis CI builds for Python 3.5
- Support for the new Flask CLI based on Click

1.8.1

- Allow to init_app to work correctly when db is given in constructor (118)

1.8.0

- Allow db to be given in constructor, while app is given later in `init_app`
- Added missing Python 2 classifiers in setup script
- Various documentation updates

1.7.0

- Added `migrate.configure` decorator to register configuration callbacks
- Documentation updates

1.6.0

- Added support for Alembic's `edit` command
- Allow migration directory to be given in constructor and not in `init_app`

1.5.1

- Do not generate a migration if no schema changes are found
- Merge command now supports multiple arguments

1.5.0

- Support for multiple databases
- Added support for Alembic's `-x` option
- Added sane default for `db downgrade --sql` command

1.4.0

- Any `kwargs` given to the `Migrate` constructor or `init_app` method are passed to Alembic as additional configuration

1.3.1

- Handle Alembic versions that have non-integer parts.

1.3.0

- Support for new commands and options introduced with Alembic 0.7
- Pep8 improvements
- Documentation improvements
- Added Travis CI builds
- Added Python 3 classifier to setup script
- Fixed unit tests to run on Python 3

1.2.0

- Support Alembic's `branch` command

1.1.1

- Included tests in release package

1.1.0

- Support a custom migrations directory
- Pass revision range to Alembic's `history` command

1.0.0

- First official release

Links

• PyPI: https://pypi.org/project/flask-migrate
• Changelog: https://pyup.io/changelogs/flask-migrate/
• Repo: http://github.com/miguelgrinberg/flask-migrate/
• Docs: https://pythonhosted.org/Flask-Migrate/