Update pypubsub requirement from <5,>=4.0.3 to >=4.0.7,<5

[dependabot]

Updates the requirements on pypubsub to permit the latest version.

Changelog

Sourced from pypubsub's changelog.

Changelog

High-level changelog. For details, consult the SVN logs.

:4.0.7 (Dec 2025):

• Modernized packaging: pyproject/setuptools-scm, tag-driven versions, tox-uv matrix, GitHub Actions CI/release.
• Expanded Python support: tested on 3.7–3.14; dropped legacy config for 3.3–3.6.
• Added helper tooling/scripts for releases and running examples; refreshed docs and ignored generated files.

:4.0.3 (Jan 2019):

• Cleanup for Python 3.7 (mostly add support for keyword-only args, use Python 3 inspect signature/Parameter and add tests for

:4.0.0 (Dec 2016):

• Verified support Python 3.5 and 3.6
• Distribution via wheel
• Abandon support for Python 2.x and easy_install; now requires Python >= 3.3
• Abandon support for long-ago deprecated arg1 messaging protocol
• Added currying of subscribed listener args
• Significant speed improvement for message delivery
• Use PEP 484 style of annotations throughout
• Use enum instead of constants when practical

:3.3.0 (Feb 2014):

• cleanup low-level API: exception classes, moved some out of pub module that did not belong there (clutter), move couple modules; specifically:

  • Removed from pub (available on object returned from pub.getDefaultTopicMgr())
    • getOrCreateTopic -> pub.getDefaultTopicMgr().getOrCreateTopic
    • getTopic -> pub.getDefaultTopicMgr().getTopic
    • newTopic -> pub.getDefaultTopicMgr().newTopic
    • delTopic -> pub.getDefaultTopicMgr().delTopic
    • getAssociatedTopics -> pub.getDefaultTopicMgr().getTopics
    • getDefaultTopicTreeRoot -> pub.getDefaultTopicMgr().getRootAllTopics
  • Removed from pub (available from pubsub.core):
    • ITopicDefnProvider
  • Moved from pub into to pubsub.core.TopicDefnProvider class as classmethod:
    • registerTopicDefnProviderType
  • Renamed:
    • TopicNameInvalid -> TopicNameError
    • UndefinedTopic(RuntimeError) -> TopicNameError(ValueError)
    • UndefinedSubtopic(RuntimeError) -> TopicNameError(ValueError)
    • ListenerInadequate(TypeError) -> ListenerMismatchError(ValueError)
    • UnrecognizedImportFormat -> UnrecognizedSourceFormatError

... (truncated)

Commits

• 4ec2c47 update docs for py version changes
• 028f4b6 update docs for py version changes
• c580ad3 support bump != 1
• 43de679 fix some tag-related bugs
• 47d591c Modernise packaging (#62)
• e923d08 Fix issue #39
• 4ada059 Fix issue #48
• 5c8c146 Merge remote-tracking branch 'origin/master'
• 2082375 Fix issue #56
• 015a057 Evict Foul Whitespace Demons 2020 (#49)
• Additional commits viewable in compare view

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