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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

- Bump `engines.node` from `>=16.0.0` to `>=20.0.0`
- Switch `tsconfig` from `node16.json` to `node20.json`
- Update devDependencies: `eslint` ^9.39.5, `typescript` ~6.0.0, `@types/node` ^20, `@voxpelli/eslint-config` ^25, `@voxpelli/tsconfig` ^16, `npm-run-all2` ^9
- Migrate release-please workflow to OIDC (`release-please-oidc.yml`) with reduced permissions and `app-id` configuration

BREAKING CHANGE: Minimum supported Node version is now 20.0.0; Node 16 is no longer supported.

Enables an opt-in check that the commit type is one of the exact
conventional commit types as defined by @commitlint/config-conventional
(build, chore, ci, docs, feat, fix, perf, refactor, revert, style, test),
catching e.g. 'test:' vs 'tests:' or 'testing:'.

Closes #21

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