Upgrade holidays to 0.11.1

[frenck]

Proposed change

Upgrades the holidays package to 0.11.1

Changelog: https://github.com/dr-prodigy/python-holidays/blob/master/CHANGES

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example entry for configuration.yaml:

# Example configuration.yaml
binary_sensor:
  - platform: workday
    country: NL

Checklist

• The code change is tested and works locally.
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• Tests have been added to verify that the new code works.

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  Updated and included derived files by running: python3 -m script.hassfest.
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  Updated by running python3 -m script.gen_requirements_all.
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