Bump flask-migrate from 2.5.3 to 2.7.0

Bumps flask-migrate from 2.5.3 to 2.7.0.

Changelog

Sourced from flask-migrate's changelog.

Flask-Migrate Change Log

Release 2.7.0 - 2021-02-21

• Reuse engine from Flask-SQLAlchemy #343 (commit)
• Update logging configuration to include Flask-Migrate's logger (commit)

Release 2.6.0 - 2021-01-19

• Removed deprecated --head-only option #380 (commit)
• Initialize logger with a name #374 (commit) (thanks maquino1985!)
• Move import to the top in env.py file to avoid linter warnings #349 (commit) (thanks James Addison!)
• Add a note to the documentation regarding logging #330 (commit) (thanks Oliver Evans!)
• Move builds to GitHub actions (commit)

Release 2.5.3 - 2020-03-14

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

Release 2.5.2 - 2019-05-25

• add python 3.7 builds, remove 3.4 (commit)
• auto-generate change log during release (commit)
• Nicer change log (commit)

Release 2.5.1 - 2019-05-20

• Fix __version__ file not found in sdist #267 (commit) (thanks Christoph Gohlke!)

Release 2.5.0 - 2019-05-19

• helper release script (commit)
• support % character in database URLs #59 (commit)
• log command output in unit tests (commit)
• add a section on why use this extension to the docs #101 (commit)

Release 2.4.0 - 2019-02-16

• updates to env.py (commit)
• Link to binds is unreachable #244 The original link redirects to flask-sqlalchemy.pocoo.org Addressing it directly works and redirects to the latest version of flask-sqlalchemy (commit) (thanks FaBrand!)

Release 2.3.1 - 2018-11-28

• Don't swallow transaction errors #236 A change proposed by @kjohnsen from #216. You can read more starting with this comment. (commit) (thanks Nikolay Shebanov!)

... (truncated)

Commits

• 5c0b708 Release 2.7.0
• 8f8ded8 Reuse engine from Flask-SQLAlchemy (Fixes #343)
• 3a11cd8 Update logging configuration to include Flask-Migrate's logger
• d0ac2bf Version 2.6.1dev
• 5a9cdd3 Release 2.6.0
• ae0a5a9 Removed deprecated --head-only option (Fixes #380)
• c4a5151 Move builds to GitHub actions
• 4887bd5 added name to dunder init (#374)
• b34d9e3 Move import to the top in env.py file to avoid linter warnings (#349)
• f969b5e Add a note to the documentation regarding logging (Fixes #330)
• Additional commits viewable in compare view