fix(deps): update dependency @nuxtjs/composition-api to v0.26.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@nuxtjs/composition-api	0.25.1 -> 0.26.0

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Release Notes

nuxt-community/composition-api

### [`v0.26.0`](https://togithub.com/nuxt-community/composition-api/blob/master/CHANGELOG.md#​0260-httpsgithubcomnuxt-communitycomposition-apicompare02520260-2021-07-28) [Compare Source](https://togithub.com/nuxt-community/composition-api/compare/0.25.2...0.26.0) ##### Bug Fixes - resolve to single vue instance ([#​525](https://togithub.com/nuxt-community/composition-api/issues/525)) ([33171bf](https://togithub.com/nuxt-community/composition-api/commit/33171bfd4966ad18532c4e343571f567b9f1d31b)) ##### [0.25.2](https://togithub.com/nuxt-community/composition-api/compare/0.25.1...0.25.2) (2021-07-27) ##### Bug Fixes - allow setting ssrRef within `onGlobalSetup` ([#​523](https://togithub.com/nuxt-community/composition-api/issues/523)) ([320c409](https://togithub.com/nuxt-community/composition-api/commit/320c4098a5e0b071ed464b65aed1851e763755f7)) ##### [0.25.1](https://togithub.com/nuxt-community/composition-api/compare/0.25.0...0.25.1) (2021-07-22) ### [`v0.25.2`](https://togithub.com/nuxt-community/composition-api/blob/master/CHANGELOG.md#​0252-httpsgithubcomnuxt-communitycomposition-apicompare02510252-2021-07-27) [Compare Source](https://togithub.com/nuxt-community/composition-api/compare/0.25.1...0.25.2)

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