Update lume / deno deps in an easy (and automated) way.

[HappyStinson]

Just annoying to not know what the best practices are. I want my site to use the latest and greatest without too much manual hassle.

Molt looks promising.

https://questions.deno.com/m/1182973617034772591 https://github.com/hasundue/molt https://deno.land/x/molt@0.14.3