Remove query strings from static resources

## EXPIRES CACHING ##
<IfModule mod_expires.c>
ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType text/html "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 1 month"
</IfModule>
## EXPIRES CACHING ##
--- 

The only thing holding it back seems to be this element in [Pingdom](http://tools.pingdom.com/) and [Google Page Insights](https://developers.google.com/speed/pagespeed/insights/).

*Remove query strings from static resources* - Pingdom and 
*Eliminate render-blocking JavaScript and CSS in above-the-fold content* - Google

Is there an option to do this in Grav or will I need to do something with htaccess or another type of plugin?

assets:
  enable_asset_timestamp: false

media:
  enable_media_timestamp: false