chore(deps): update nuxt typescript core packages to v2.15.7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@nuxt/types	2.15.6 -> 2.15.7
nuxt	2.15.6 -> 2.15.7

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Release Notes

nuxt/nuxt.js

### [`v2.15.7`](https://togithub.com/nuxt/nuxt.js/releases/v2.15.7) [Compare Source](https://togithub.com/nuxt/nuxt.js/compare/v2.15.6...v2.15.7) ##### 🔰 Security advisory Please upgrade to `nuxt@^2.15.7` if using `nuxt@2.15.5` or `nuxt@2.15.6` ##### 🐛 Bug Fixes - `vue-app` - [#​9431](https://togithub.com/nuxt/nuxt.js/issues/9431) Check whether a route exists within the nuxt app before replacing

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