Add versioning or timestamp to minified files on save

[joanhey]

A feature request. For cleaning the caches. add to config: minify.timestampOnSave (or versions) if "minify.minifyExistingOnSave": true,

then create 'file.min.timestamp.ext'

and optionally too, make a search and replace in the project. 'minify.timestampReplace' Thank you for that extension.