build: update dependency vuex-persist to ~1.8.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
vuex-persist	dependencies	minor	~1.4.0 -> ~1.8.0

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Release Notes

championswimmer/vuex-persist

### [`v1.8.0`](https://togithub.com/championswimmer/vuex-persist/compare/v1.7.2...v1.8.0) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.7.2...v1.8.0) ### [`v1.7.2`](https://togithub.com/championswimmer/vuex-persist/compare/v1.7.1...v1.7.2) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.7.1...v1.7.2) ### [`v1.7.1`](https://togithub.com/championswimmer/vuex-persist/blob/master/CHANGELOG.md#​171) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.7.0...v1.7.1) - allow constructing without options object ### [`v1.7.0`](https://togithub.com/championswimmer/vuex-persist/compare/v1.6.1...v1.7.0) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.6.1...v1.7.0) ### [`v1.6.1`](https://togithub.com/championswimmer/vuex-persist/blob/master/CHANGELOG.md#​161) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.6.0...v1.6.1) - fix deepmerge to overwrite arrays (and not concat) ### [`v1.6.0`](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.4...v1.6.0) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.4...v1.6.0) ### [`v1.5.4`](https://togithub.com/championswimmer/vuex-persist/blob/master/CHANGELOG.md#​154) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.3...v1.5.4) - remove `MockStorage` from umd builds (as it was only for NodeJS mocking) ### [`v1.5.3`](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.2...v1.5.3) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.2...v1.5.3) ### [`v1.5.2`](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.1...v1.5.2) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.1...v1.5.2) ### [`v1.5.1`](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.0...v1.5.1) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.5.0...v1.5.1) ### [`v1.5.0`](https://togithub.com/championswimmer/vuex-persist/compare/v1.4.4...v1.5.0) [Compare Source](https://togithub.com/championswimmer/vuex-persist/compare/v1.4.4...v1.5.0)

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