fix(deps): update dependency rate-limiter-flexible to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rate-limiter-flexible	~3.0.6 -> ~4.0.0

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Release Notes

animir/node-rate-limiter-flexible (rate-limiter-flexible)

### [`v4.0.0`](https://togithub.com/animir/node-rate-limiter-flexible/releases/tag/v4.0.0): DynamoDB support [Compare Source](https://togithub.com/animir/node-rate-limiter-flexible/compare/v3.0.6...v4.0.0) Thanks to [@​Daniel-97](https://togithub.com/Daniel-97) `rate-limiter-flexible` supports DynamoDB now! Usage example can be found [here](https://togithub.com/animir/node-rate-limiter-flexible/wiki/DynamoDB). BREAKING CHANGES: we dropped support for Node.js 12 and previous versions. :tiger:

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Configuration

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