Update dependency eslint-config-problems to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
eslint-config-problems	5.0.0 -> 6.0.0

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Release Notes

ryanzim/eslint-config-problems

### [`v6.0.0`](https://togithub.com/ryanzim/eslint-config-problems/releases/6.0.0) [Compare Source](https://togithub.com/ryanzim/eslint-config-problems/compare/5.0.0...6.0.0) - **BREAKING:** Require eslint v8.2+ - Add [`no-unused-private-class-members`](https://eslint.org/docs/rules/no-unused-private-class-members) rule

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