Chore(deps-dev): Update zope-testrunner requirement from <7,>=5 to >=5,<8

[dependabot]

Updates the requirements on zope-testrunner to permit the latest version.

Changelog

Sourced from zope-testrunner's changelog.

7.0 (2025-02-12)

Backwards-incompatible changes

• Remove setup.py ftest command. ([#178](https://github.com/zopefoundation/zope.testrunner/issues/178) <https://github.com/zopefoundation/zope.testrunner/issues/178>_)

• Remove zope.testrunner.eggsupport. It is no longer usable as of setuptools 72.0.0. ([#185](https://github.com/zopefoundation/zope.testrunner/issues/185) <https://github.com/zopefoundation/zope.testrunner/issues/185>_)

6.7 (2025-02-07)

• Drop support for Python 3.8.

• Add option --only-level=level to run tests only at the specified level. ([#188](https://github.com/zopefoundation/zope.testrunner/issues/188) <https://github.com/zopefoundation/zope.testrunner/issues/188>_)

6.6.1 (2024-12-13)

• Make signatures in tb_format Python 3.12+ compatible ([#186](https://github.com/zopefoundation/zope.testrunner/issues/186) <https://github.com/zopefoundation/zope.testrunner/issues/186>_)

6.6 (2024-10-16)

• Make tests compatible with Python 3.13 + add support for that version. ([#181](https://github.com/zopefoundation/zope.testrunner/issues/181) <https://github.com/zopefoundation/zope.testrunner/pull/181>_)

• Drop support for Python 3.7.

6.5 (2024-08-06)

• Remove setuptools fossils.

• unittest.TestCase.subTest support ([#91](https://github.com/zopefoundation/zope.testrunner/issues/91) <https://github.com/zopefoundation/zope.testrunner/issues/91>_).

• remove support for setup.py's test command. Support for this command has been dropped by modern setuptools versions and correspondingly has been removed from

... (truncated)

Commits

• 5a87d31 Preparing release 7.0
• 1f2c4f3 Merge pull request #192 from cjwatson/remove-eggsupport
• ffb3311 Remove ftest command and zope.testrunner.eggsupport
• 21dccee Back to development: 6.8
• ba3aab6 Preparing release 6.7
• 568e2e1 Drop support for Python 3.8 (#191)
• e093dfe Add option --only-level=level to run tests only at the specified level. (#190)
• d976b20 Back to development: 6.7
• 731249c Preparing release 6.6.1
• 73692d3 Merge pull request #187 from zopefoundation/tb_format_signatures
• Additional commits viewable in compare view

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[amotl]

@dependabot rebase