Update readme file

We heavily use Google Maps in our projects, so I wanted to have a well maintained Google Maps library.

## Documentation

Checkout https://vue-map.netlify.app for a detailed documentation

Checkout [vue-map.netlify.app](https://vue-map.netlify.app) for a detailed documentation

## Installation

You can install it using npm

### Configure Vue to use the Components

In your `main.js` or inside a Nuxt plugin:

In your `main.js`

```js

import { createApp } from 'vue'

If you want to access `google map` object, you can access it by getting ref of the map object.

```vue

<template>

  <GMapMarker ref="myMarker" />

  <GMapMap ref="myMapRef" />

</template>

<script>

export default {

  mounted() {

    console.log(this.$refs.myMarker)

    console.log(this.$refs.myMapRef)

  }

}

</script>

</GMapMap>

```

## More components

Many other components are also supported. Checkout [docs](https://vue-map.netlify.app) for more.

## Contributions

The best way to contribute is to report reproducible bugs, but feature requests and improvement suggestions are always welcome too. And definitely bug fixes and PR are welcome.