build(deps): bump openpyxl from 3.0.7 to 3.0.8

[dependabot]

Bumps openpyxl from 3.0.7 to 3.0.8.

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[github-actions]

Here are some friendly prose warnings from write-good:

In ./docker/README.md
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 will be approved by the European Commission - subsequent
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- Update sphinx requirement from ^3.3.1 to ^4.1.2 [\#469](https://github.com/jmu
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- Update pep8-naming requirement from ^0.11.1 to ^0.12.1 [\#462](https://github.
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- Update black requirement from ^20.8b1 to ^21.7b0 [\#461](https://github.com/jm
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- Update faker requirement from ^6.1.1 to ^8.11.0 [\#455](https://github.com/jmu
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- Update mypy requirement from ^0.800 to ^0.910 [\#429](https://github.com/jmuel
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te flake8-rst-docstrings requirement from ^0.0.13 to ^0.2.3 [\#393](https://gith
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- Update flake8-bugbear requirement from ^20.1.4 to ^21.4.3 [\#371](https://gith
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 Update sphinx-autobuild requirement from ^2020.9.1 to ^2021.3.14 [\#362](https:
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- Update faker requirement from ^5.3.0 to ^6.1.1 [\#346](https://github.com/jmue
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- Update mypy requirement from ^0.790 to ^0.800 [\#337](https://github.com/jmuel
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- Update faker requirement from ^4.17.1 to ^5.3.0 [\#321](https://github.com/jmu
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In ./.github/ISSUE_TEMPLATE/feature_request.md
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In ./.github/ISSUE_TEMPLATE/bug_report.md
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**Additional context**
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