added page level ads prop

[emish89]

I added the prop to manage the page level ads, it has to be tested better

[hustcc]

official document：

<script>
(adsbygoogle = window.adsbygoogle || []).push({
google_ad_client: "ca-pub-123456789",
enable_page_level_ads: true
});
</script>

so add it into dom attribute is really work? can help add a demo on website?

[robinvdv12]

Could you please explain with a little more detail? I have some problems when switching routes with React Router