Update flask-migrate requirement from ~=2.2.1 to ~=2.5.3

[dependabot]

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

Changelog

Sourced from flask-migrate's changelog.

Flask-Migrate Change Log

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)

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!)

Release 2.3.0 - 2018-10-05

• use the root logger for alembic error messages (commit)
• Add indicate-current option into history command #192 (commit) (thanks misebox!)

Release 2.2.1 - 2018-06-18

• dependency updates (commit)
• add pypy3 to test matrix (commit)

Release 2.2.0 - 2018-06-13

... (truncated)

Commits

• d861594 Release 2.5.3
• 399cb28 Allow Path objects to be used as directory parameter (#319)
• 1b6355c build only on Python 3.6 and up
• aa05b83 Added a message to a initial migrate. (#313)
• 825f7d6 Add Travis test support for Python 3.8 (#308)
• 80453c3 Fix pypy3 unit tests (Fixes #299)
• 6a76c24 add example of how to set up with init_app method (#302)
• f4f19f5 remove old version of documentation #nolog
• 47338ea add github sponsor info to funding
• e5135e5 tests: Use sys.executable (#290)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)