Broken $route and $router definition when adding a second plugin

[Shinigami92]

Version

4.0.0-beta.11

Reproduction link

https://github.com/Shinigami92/vue-gtm-test-vue3

Steps to reproduce

• Create project with "vue-router": "^4.0.0-0" and a plugin like "vue-gtm": "3.0.0-alpha.3"
• Use this.$gtm, this.$route and this.$router

What is expected?

Code throws no compile / build errors

What is actually happening?

Code throws compile / build errors

---

• $route and $router type declarations seem to be missing in distributed declaration file #419
• https://github.com/vuejs/vue-next/blob/6aeafef1a548fbe9ea970bb73178cba3608c0fa7/packages/runtime-core/src/componentPublicInstance.ts#L50-L54
• Not usable in Vue 3 with Typescript? mib200/vue-gtm#89

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