Update flask-migrate requirement from ~=2.7.0 to ~=3.0.0

[dependabot]

Updates the requirements on flask-migrate to permit the latest version.

Changelog

Sourced from flask-migrate's changelog.

Flask-Migrate Change Log

Release 3.0.0 - 2021-05-15

• Remove support for Flask-Script #403 (commit)
• Use unittest testrunner #397 (commit) (thanks Jürgen Gmach!)
• Remove dependency on six package #395 (commit) (thanks Jürgen Gmach!)
• Added sphinx build files to .gitignore file #394 (commit) (thanks Jürgen Gmach!)
• Fix Sphinx warning #393 (commit) (thanks Jürgen Gmach!)

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 miguelgrinberg/Flask-Migrate#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)

... (truncated)

Commits

• d81b0d4 Release 3.0.0
• a23ae69 rename master branch to main #nolog
• a1787cf Remove support for Flask-Script (Fixes #403)
• 1c6a8ee rename master branch to main #nolog
• 5e75b1b Use unittest testrunner (#397)
• 4ad897f remove obsolete dependency (#395)
• 6566e3d gitignore sphinx build files (#394)
• a2d31b7 fix Sphinx warning (#393)
• 80e1e2b Version 2.7.1dev
• See full diff in compare view

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[dependabot]

Superseded by #273.