Support parsing of node attributes in J2602 LDF file

[nuts4coffee]

Brief

• Allow parse of LDF files with "wakeup_time" and "poweron_time" node attributes.

Reference: J2602_3 Oct 2021:

Checklist

• [ ] Add relevant labels to the Pull Request
• [ ] Review test results and code coverage
  • [ ] Review snapshot test results for deviations
• [x] Review code changes
  • [ ] Create relevant test scenarios
  • [ ] Update examples
  • [ ] Update JSON schema
• [ ] Update documentation
  • [ ] Update examples in README
• [ ] Update changelog
• [ ] Update version number

Resolves

• Describe the bug or feature and link to relevant issues

Evidence

• Analyze how the change might impact existing code

• Provide evidence that the feature is tested and covered properly

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (63ae6cc) 96.28% compared to head (b5eb268) 96.30%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #130 +/- ## ========================================== + Coverage 96.28% 96.30% +0.02% ========================================== Files 13 13 Lines 1453 1463 +10 ========================================== + Hits 1399 1409 +10 Misses 54 54 ``` | [Flag](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | Coverage Δ | | |---|---|---| | [3.10](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.11](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.12](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.6](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.7](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.8](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | | [3.9](https://app.codecov.io/gh/c4deszes/ldfparser/pull/130/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes) | `96.30% <100.00%> (+0.02%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Bal%C3%A1zs+Eszes#carryforward-flags-in-the-pull-request-comment) to find out more.

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[nuts4coffee]

@c4deszes Could you please help review this change? I notice some pipeline jobs have failed but I don't think they're related to my changes. Please let me know if there is anythng to fix on my end. Thanks.