Update flask_migrate to 3.0.0

[pyup-bot]

This PR updates flask_migrate from 2.1.0 to 3.0.0.

Changelog

3.0.0

- Remove support for Flask-Script [403](https://github.com/miguelgrinberg/flask-migrate/issues/403) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/a1787cf18fb4d5ec7369280afe1a59349f7544b8))
- Use unittest testrunner [397](https://github.com/miguelgrinberg/flask-migrate/issues/397) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/5e75b1b574dd7ee991ca2fae0b2ccd63a0f98d81)) (thanks **Jürgen Gmach**!)
- Remove dependency on six package [395](https://github.com/miguelgrinberg/flask-migrate/issues/395) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/4ad897f1c3522ecf529cb83f70ef72bc3c32ba6f)) (thanks **Jürgen Gmach**!)
- Added sphinx build files to .gitignore file [394](https://github.com/miguelgrinberg/flask-migrate/issues/394) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/6566e3dc5d5aa6dc7ca7a6228655f0a9d78d42e6)) (thanks **Jürgen Gmach**!)
- Fix Sphinx warning [393](https://github.com/miguelgrinberg/flask-migrate/issues/393) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/a2d31b723517a9f72a9735ff70d858f7158dd4b3)) (thanks **Jürgen Gmach**!)

2.7.0

- Reuse engine from Flask-SQLAlchemy [343](https://github.com/miguelgrinberg/flask-migrate/issues/343) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/8f8ded8799c65e2b3490a82b5e3a3953c33c58dd))
- Update logging configuration to include Flask-Migrate's logger ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/3a11cd8392733bd8315458c47d769d952494bdd7))

2.6.0

- Removed deprecated --head-only option [380](https://github.com/miguelgrinberg/flask-migrate/issues/380) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/ae0a5a922106d67605adcebe9e3f13b1ed5f84e8))
- Initialize logger with a name [374](https://github.com/miguelgrinberg/flask-migrate/issues/374) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/4887bd53bc08f10087fe27a4a7d9fe853031cdcf)) (thanks **maquino1985**!)
- Move import to the top in env.py file to avoid linter warnings [349](https://github.com/miguelgrinberg/flask-migrate/issues/349) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/b34d9e3ff79ffb2f6c0204289f697a08852d0859)) (thanks **James Addison**!)
- Add a note to the documentation regarding logging [330](https://github.com/miguelgrinberg/flask-migrate/issues/330) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/f969b5ea087f2d9bf646492e1a5ca23535dfac5f)) (thanks **Oliver Evans**!)
- Move builds to GitHub actions ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/c4a515105e84ae201208cd02159116653dc5e821))

2.5.3

- Allow `Path` objects to be used as `directory` parameter [319](https://github.com/miguelgrinberg/flask-migrate/issues/319) Closes [#318](https://github.com/miguelgrinberg/flask-migrate/issues/318). ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/399cb28cc128539111234f7ecea0b3187325af82)) (thanks **Nicolas Schneider**!)
- Use same database URLs as Flask-SQLAlchemy [276](https://github.com/miguelgrinberg/flask-migrate/issues/276) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/4a180b711bf87572617a0b7caad0a7151f53fde7))
- Document how to set up with init_app method [302](https://github.com/miguelgrinberg/flask-migrate/issues/302) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/6a76c245740d9af3ad5eef56ee9ff15f8205a0ca)) (thanks **Kyle Lawlor**!)
- Document how to include a message in initial migrate. [313](https://github.com/miguelgrinberg/flask-migrate/issues/313) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/aa05b836a2fe89363bc2d61a699acd54aca52bd5)) (thanks **Bernardo Gomes**!)
- Remove checks for alembic 0.7.0 [278](https://github.com/miguelgrinberg/flask-migrate/issues/278) Flask-Migrate requires alembic >= 0.7 in its setup.py file, which makes all the checks for this version obsolete. ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/97b8d334324ecb043fb0ddaef1660f36832af02c)) (thanks **Tadej Borovšak**!)
- Use sys.executable in tests [290](https://github.com/miguelgrinberg/flask-migrate/issues/290) Also re-order imports. Closes https://github.com/miguelgrinberg/Flask-Migrate/issues/289 ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/e5135e5a6a31675d5fb10febe815b257d82632a2)) (thanks **John Vandenberg**!)
- Cosmetic improvements to help messages [284](https://github.com/miguelgrinberg/flask-migrate/issues/284) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/d501d8b2923187df00d6bb1ec1f04694ab3f9667)) (thanks **Marat Sharafutdinov**!)

2.5.2

- add python 3.7 builds, remove 3.4 ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/1af28ba273de6c88544623b8dc02dd539340294b))
- auto-generate change log during release ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/250a3110ad84ba331ffc7cb871e5a12fddc55f2d))
- Nicer change log ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/829edefe09dff82b6c91203dd0f5b5795bf9c8d1))

2.5.1

- Fix `__version__` file not found in sdist [267](https://github.com/miguelgrinberg/flask-migrate/issues/267) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/8ba8d7dca6cb233280d4644fc8d81cbba123a5ad)) (thanks **Christoph Gohlke**!)

2.5.0

- helper release script ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/fb041b9b9221e7125e5ee27dd9eb7514cf143181))
- support % character in database URLs [59](https://github.com/miguelgrinberg/flask-migrate/issues/59) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/4663819b416dfb5a450fe948e84111af3712078d))
- log command output in unit tests ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/506f3541c04dd0b2c020dbafc60a93fb541ca324))
- add a section on why use this extension to the docs [101](https://github.com/miguelgrinberg/flask-migrate/issues/101) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/5467b295f7912d195333482325052eae81d30f7a))

2.4.0

- updates to env.py ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/2a1ae1b9aa62c246fca2b2f1566284de8d4b940b))
- Link to binds is unreachable [244](https://github.com/miguelgrinberg/flask-migrate/issues/244) The original link redirects to flask-sqlalchemy.pocoo.org Addressing it directly works and redirects to the latest version of flask-sqlalchemy ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/eb2ab8f797a179d807b6560947f4498bb543def0)) (thanks **FaBrand**!)

2.3.1

- Don't swallow transaction errors [236](https://github.com/miguelgrinberg/flask-migrate/issues/236) A change proposed by kjohnsen from [#216](https://github.com/miguelgrinberg/flask-migrate/issues/216). You can read more starting with [this comment](https://github.com/miguelgrinberg/Flask-Migrate/issues/216#issuecomment-408159125). ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/87b40ec9b2113ab87f1dc41c4eb517e8ff0f5dd8)) (thanks **Nikolay Shebanov**!)

2.3.0

- use the root logger for alembic error messages ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/fa3b45ea6ecd16f436bbdee210745335128bf514))
- Add indicate-current option into history command [192](https://github.com/miguelgrinberg/flask-migrate/issues/192) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/1fa1936375bf609e9dab401e26f46f715f5b272b)) (thanks **misebox**!)

2.2.1

- dependency updates ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/5d61c191d7d8853f81e4fe71609b5ae315604c52))
- add pypy3 to test matrix ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/1cc819e9f2a17435429c16531043d0a874f76288))

2.2.0

- suppress stack traces on command errors [204](https://github.com/miguelgrinberg/flask-migrate/issues/204) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/2dd45d0037cb62bc7a8a981f0de70071b891a2ff))
- Fix typo in docs [207](https://github.com/miguelgrinberg/flask-migrate/issues/207) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/817893fe16eb5361469af671c52d8276b69efeab)) (thanks **Grey Li**!)
- Update documentation link [206](https://github.com/miguelgrinberg/flask-migrate/issues/206) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/98374a6ac1006fe37ef6f09674ebaa094214ff3e)) (thanks **Grey Li**!)
- [182](https://github.com/miguelgrinberg/flask-migrate/issues/182): clear executable permission [#183](https://github.com/miguelgrinberg/flask-migrate/issues/183) ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/ee0b47ede1e88340c390fca9d0c27a9c8a7e3a9c)) (thanks **Christopher Yeleighton**!)

2.1.1

- Make directory as optional parameter ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/7e6f511b050a023c9388868b97d7905b7571c16f)) (thanks **Diego Oliveira**!)
- Update CHANGELOG.md ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/dcffe1e91f9f5cfc29c5cf5f285ef9a4169113bb))
- updated README.md to use flask cli in examples ([commit](https://github.com/miguelgrinberg/flask-migrate/commit/349826ef53f607fd5e866919f40b16315a2127cc))

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/