deps: update dependency zipp to v3.8.1 (#23)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [zipp](https://github.com/jaraco/zipp) | `==3.6.0` -> `==3.8.1` | [![age](https://badges.renovateapi.com/packages/pypi/zipp/3.8.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/zipp/3.8.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/zipp/3.8.1/compatibility-slim/3.6.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/zipp/3.8.1/confidence-slim/3.6.0)](https://docs.renovatebot.com/merge-confidence/) |

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