fix(deps): pin dependencies

This MR contains the following updates:

Package	Type	Update	Change
coverage	dev	pin	^7.2.7 -> 7.12.0
freezegun (changelog)	dev	pin	^1.5.5 -> 1.5.5
pre-commit	dev	pin	^4.0.0 -> 4.5.0
pytest (changelog)	dev	pin	^9.0.0 -> 9.0.1
pytest-cov (changelog)	dev	pin	^7.0.0 -> 7.0.0
pytest-env	dev	pin	^1.1.3 -> 1.2.0
registry.gitlab.developers.cam.ac.uk/uis/devops/lib/ucam-faas-python	final	pinDigest	-> 9bfbda6

Add the preset :preserveSemverRanges to your config if you don't want to pin your dependencies.

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