Show config in adapter usage

[jthegedus]

Is your feature request related to a problem? Please describe.

The docs should also show usage of adapter options alongside zero-option usage it now shows.

Describe the solution you'd like

+import firebase from "svelte-adapter-firebase";

/** @type {import('@sveltejs/kit').Config} */
const config = {
	kit: {
		// hydrate the <div id="svelte"> element in src/app.html
+       adapter: firebase(),
		target: '#svelte'
	}
};

export default config;

With options:

+import firebase from "svelte-adapter-firebase";

/** @type {import('@sveltejs/kit').Config} */
const config = {
	kit: {
		// hydrate the <div id="svelte"> element in src/app.html
-       adapter: firebase(),
+       adapter: firebase({ firebaseJson: '../firebase.json' }),
		target: '#svelte'
	}
};

export default config;

Describe alternatives you've considered

Additional context

[github-actions]

🎉 This issue has been resolved in version 0.7.5 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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