Fix tibber fails if power production is enabled but no power is produced

[nohn]

Breaking change

Proposed change

Type of change

• [x] Dependency upgrade
• [x] 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 #125312
• This PR is related to issue:
• Link to documentation pull request:
• pyTibber is upgraded from 0.30.1 to 0.30.2: https://github.com/Danielhiversen/pyTibber/compare/0.30.1...0.30.2 which includes a fix for https://github.com/home-assistant/core/pull/124595#issuecomment-2312497581 that made it into 2024.9 and has been filed as #125312

Checklist

• [ ] The code change is tested and works locally. I don't have solar equipment, so I can't fully test this. However, the comments in #125312 suggest, this dependency bump fixes this issue.
• [ ] Local tests pass. Your PR cannot be merged unless tests pass I don't have solar equipment, so I can't fully test this. However, the comments in #125312 suggest, this dependency bump fixes this issue.
• [x] There is no commented out code in this PR.
• [x] I have followed the development checklist
• [ ] I have followed the perfect PR recommendations I don't have solar equipment, so I can't fully test this. However, the comments in #125312 suggest, this dependency bump fixes this issue.
• [x] The code has been formatted using Ruff (ruff format homeassistant tests)
• [ ] Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• [ ] Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• [x] The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• [x] New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• [x] For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.

To help with the load of incoming pull requests:

• [ ] I have reviewed two other open pull requests in this repository.

[home-assistant[bot]]

Hey there @danielhiversen, mind taking a look at this pull request as it has been labeled with an integration (tibber) you are listed as a code owner for? Thanks!

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[MartinHjelmare]

Test failure is unrelated.