chore(config): Simplify and fix Renovate config

[codecov[bot]]

Codecov Report

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

Project coverage is 63.51%. Comparing base (57b01fa) to head (2f79625). Report is 2 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #195 +/- ## ======================================== Coverage 63.51% 63.51% ======================================== Files 81 81 Lines 995 995 Branches 89 89 ======================================== Hits 632 632 Misses 349 349 Partials 14 14 ``` | [Flag](https://app.codecov.io/gh/alarmdisplay/display/pull/195/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alarmdisplay) | Coverage Δ | | |---|---|---| | [server](https://app.codecov.io/gh/alarmdisplay/display/pull/195/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=alarmdisplay) | `63.51% <ø> (ø)` | | 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=alarmdisplay#carryforward-flags-in-the-pull-request-comment) to find out more.

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