Bump pyTibber to 0.30.4

[Danielhiversen]

Breaking change

Proposed change

Fix tibber.get_prices
Update Tibber lib Danielhiversen/pyTibber@0.30.3...0.30.4

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)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes tibber.get_prices results in "Unknown Error", reloading integration solves the issue #125674
• This PR is related to issue:
• Link to documentation pull request:

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[joostlek]

Tests are failing, can you take a look?

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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