Update dependency i18next-conv to v15 (1.10)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
i18next-conv	14.1.0 -> 15.0.0

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Release Notes

i18next/i18next-gettext-converter (i18next-conv)

### [`v15.0.0`](https://togithub.com/i18next/i18next-gettext-converter/releases/tag/v15.0.0) [Compare Source](https://togithub.com/i18next/i18next-gettext-converter/compare/v14.1.0...v15.0.0) BREAKING: require node >= 18 add support for node 22

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