You have an undeclared dependency on attrs

[FollowTheProcess]

Describe the bug
A clear and concise description of what the bug is.

Hey there! I was using your project and couldn't figure out why I was getting weird errors that didn't show up in my dev environment.

It seems like you use attrs but don't declare it as a dependency in pyproject.toml, my dev environment had it in from some other project hence why I only saw the errors once I installed my project outside the dev environment.

Imported here:

httpx-cache/httpx_cache/utils.py

Line 8 in 7789306

import attr

Used here:

httpx-cache/httpx_cache/utils.py

Line 94 in 7789306

@attr.s

But it's not listed in dependencies in pyproject.toml here:

httpx-cache/pyproject.toml

Line 30 in 7789306

[tool.poetry.dependencies]

When I ran my project I got ModuleNotFoundError and traced it back here.

Expected behavior
A clear and concise description of what you expected to happen.

The dependency should be declared in pyproject.toml

Screenshots
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I forgot to grab any screenshots but I hope the problem is clear

Desktop (please complete the following information):

• OS: [e.g. iOS] MacOS
• Version [e.g. 22] Python 3.10.1

Additional context
Add any other context about the problem here.

[obendidi]

Thanks for the PR, I'll prepare a new release shortly with the fix ^^

[FollowTheProcess]

No worries! Happy to help, great project btw, fits my use case perfectly

[obendidi]

Glad to hear that, don't hesitate if you have any feature requests ^^.