Update dependency cachelib to v0.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cachelib (changelog)	==0.6.0 -> ==0.9.0

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Release Notes

pallets/cachelib

v0.9.0

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Released 2022-06-26

• Add separate internal read/write clients to RedisCache to improve compatibility with flask-caching. :pr:159
• Fix bug where cache entries would expire immediately when RedisCache.add was called without timeout. :pr:157
• Improve FileSystemCache.set compatibility with Windows systems. :pr:158

v0.8.0

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Released 2022-06-13

• Remove deprecated RedisCache.load_object and RedisCache.dump_object. :pr:147

v0.7.0

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Released 2022-05-14

• FileSystemCache now stores universal expiration timestamps using python's struct module. :pr:126
• Drop support for Python 3.6. :pr:134

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