Merge pull request #22 from danielroe/module-installation

docs: use new `nuxi module add` command in installation

Author: kasvith

README.md

@@ -8,22 +8,8 @@ Nuxt Module for [vue3-google-signin](https://vue3-google-signin.wavezync.com/)
 
 ### Install package
 
-- With **NPM**
-
-```bash
-npm install -S nuxt-vue3-google-signin
-```
-
-- With **Yarn**
-
-```bash
-yarn add nuxt-vue3-google-signin
-```
-
-- With **PNPM**
-
 ```bash
-pnpm add nuxt-vue3-google-signin
+npx nuxi@latest module add nuxt-vue3-google-signin
 ```
 
 ### Initialize