Update dependency vite-plugin-istanbul to v6

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
vite-plugin-istanbul	^5.0.0 -> ^6.0.0

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Release Notes

ifaxity/vite-plugin-istanbul (vite-plugin-istanbul)

### [`v6.0.0`](https://togithub.com/iFaxity/vite-plugin-istanbul/releases/tag/v6.0.0) [Compare Source](https://togithub.com/ifaxity/vite-plugin-istanbul/compare/v5.0.0...v6.0.0) ##### Bug Fixes - add regex for vue SFC to prevent instrumenting style and templates ([#​180](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/180)) ([c8a7ca7](https://togithub.com/ifaxity/vite-plugin-istanbul/commit/c8a7ca771e6b202b310b143a8850151598208578)), closes [#​96](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/96) [#​178](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/178) [#​89](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/89) - feat!: update to support vite v5 ([#​183](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/183)) ([614f8bd](https://togithub.com/ifaxity/vite-plugin-istanbul/commit/614f8bd365f22ded4322fc7dbea8de46ff4feea5)), closes [#​183](https://togithub.com/ifaxity/vite-plugin-istanbul/issues/183) ##### BREAKING CHANGES - updating from espree v9 to v10 deprecates older node versions - feat!: update to support vite v5 - least supported version changed from v2.9.1 to v4

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