Update dependency nativescript-vue to v2.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
nativescript-vue	2.8.4 -> 2.9.0

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Release Notes

nativescript-vue/nativescript-vue

### [`v2.9.0`](https://togithub.com/nativescript-vue/nativescript-vue/blob/master/CHANGELOG.md#​290-httpsgithubcomnativescript-vuenativescript-vuecomparev284v290-2021-04-01) [Compare Source](https://togithub.com/nativescript-vue/nativescript-vue/compare/v2.8.4...v2.9.0) ##### Features - add rootlayout to element-registry ([#​808](https://togithub.com/nativescript-vue/nativescript-vue/issues/808)) ([ae69033](https://togithub.com/nativescript-vue/nativescript-vue/commit/ae690337a896a10c450e804a965fb406914cdf28)) - ns8 ([2a14f4a](https://togithub.com/nativescript-vue/nativescript-vue/commit/2a14f4adcd5577821401fe9464152e9d1926bf1a)) #### [2.8.4](https://togithub.com/nativescript-vue/nativescript-vue/compare/v2.8.3...v2.8.4) (2021-03-10) ##### Bug Fixes - child of NavigationEntry key generated in render ([#​813](https://togithub.com/nativescript-vue/nativescript-vue/issues/813)) ([#​814](https://togithub.com/nativescript-vue/nativescript-vue/issues/814)) ([ee47fc1](https://togithub.com/nativescript-vue/nativescript-vue/commit/ee47fc1d08ab6b89ff778ff305a90017cb527c44)) - incorrect nextSibling of prevSibling in appendChild/insertBefore ([#​811](https://togithub.com/nativescript-vue/nativescript-vue/issues/811)) ([5156f20](https://togithub.com/nativescript-vue/nativescript-vue/commit/5156f20b051dcd7b2e23d01eba80030f053259ad)), closes [#​809](https://togithub.com/nativescript-vue/nativescript-vue/issues/809) [#​809](https://togithub.com/nativescript-vue/nativescript-vue/issues/809) #### [2.8.3](https://togithub.com/nativescript-vue/nativescript-vue/compare/v2.8.2...v2.8.3) (2020-11-24) ##### Bug Fixes - patchTemplate should flush pending callbacks ([9125286](https://togithub.com/nativescript-vue/nativescript-vue/commit/91252861a7f1f8ca02dbf5704e7edac81250b0cf)) #### [2.8.2](https://togithub.com/nativescript-vue/nativescript-vue/compare/v2.8.1...v2.8.2) (2020-11-21) ##### Bug Fixes - once event modifier ([#​752](https://togithub.com/nativescript-vue/nativescript-vue/issues/752)) ([2a1b06f](https://togithub.com/nativescript-vue/nativescript-vue/commit/2a1b06fc29f1289dae33170c5b706f94c96da328)), closes [#​748](https://togithub.com/nativescript-vue/nativescript-vue/issues/748) - wrong import for getCssFileName ([#​738](https://togithub.com/nativescript-vue/nativescript-vue/issues/738)) ([f1110f1](https://togithub.com/nativescript-vue/nativescript-vue/commit/f1110f14f3dca664c6789e4d2cbb61dbaba3ea5d)) #### [2.8.1](https://togithub.com/nativescript-vue/nativescript-vue/compare/v2.8.0...v2.8.1) (2020-09-03) ##### Bug Fixes - use preferred imports for ns7 ([4c38dfa](https://togithub.com/nativescript-vue/nativescript-vue/commit/4c38dfa42491742262aecc81951d4b80ae8fd2db)) ##### Features - upgrade to NS7 ([#​709](https://togithub.com/nativescript-vue/nativescript-vue/issues/709)) ([6d1f02b](https://togithub.com/nativescript-vue/nativescript-vue/commit/6d1f02b7a37a89d015f7a059e93f3f3540ab627a))

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