Bump pypdns from 1.5.2 to 2.0.0 in /requirements

[dependabot[bot]]

Bumps pypdns from 1.5.2 to 2.0.0.

Commits

• 91690f3 chg: Improve type definitions.
• e7a994c new: Add method and class to check and match the types with the RFC
• c1dd4c9 fix: use main branch
• 90eb305 chg: Updade mypy test
• 3f4ac80 fix: Properly call pytest
• d8e839e chg: Add pytest
• 8ee9c09 Create python-package.yml
• cc16700 chg: Improve typing, add mypy github action
• 37af352 chg: Bump version, deps
• 9876286 Merge pull request #8 from simonsben/master
• Additional commits viewable in compare view

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