Added $strict parameter to rev() function

This PR introduces an optional $strict parameter to the {{ rev(...) }} Twig function that allows you to have FilenameRev fallback to appending a query string in case the file does not exist in the manifest.

Non-existing files will also pass through if $strict = false as well.

Settings Changes for Beta 8

Craft 3 beta 8 changed the way plugin settings are handled.

Initial Release

1.0.0

Fix composer