Bump flask from 1.1.2 to 1.1.4

[dependabot[bot]]

Bumps flask from 1.1.2 to 1.1.4.

Changelog

Sourced from flask's changelog.

Version 1.1.4

Released 2021-05-13

• Update static_folder to use _compat.fspath instead of os.fspath to continue supporting Python < 3.6 :issue:4050

Version 1.1.3

Released 2021-05-13

• Set maximum versions of Werkzeug, Jinja, Click, and ItsDangerous. :issue:4043
• Re-add support for passing a pathlib.Path for static_folder. :pr:3579

Commits

• 1ca199f Merge pull request #4051 from pallets/release-1.1.4
• 64a5d7a release version 1.1.4
• 5f8d3ea Merge pull request #4049 from brettlangdon/fix.os.fspath
• 3ace642 Use compat fspath instead of os.fspath
• c04b0de Merge pull request #4048 from pallets/release-1.1.3
• 661bbcd release version 1.1.3
• ae647b5 Merge pull request #4047 from pallets/maximum-versions
• 6d8b4ce set maximum versions of pallets dependencies
• 1672c5f Merge pull request #3939 from kangetsu121/fix_link_and_typo
• 6eeaa2e fix a broken link
• Additional commits viewable in compare view

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