[ENHANCEMENT]: web-crypto support

[markusahlstrand]

Is your feature request related to a problem? Please describe...

I would like to use xml-crypto in WinterCG environments like cloudflare workers.

Describe teh solution you'd like...

Replace the dependency on node crypto with web-crypto. It should be backwards compatible to node 16.

Describe the alternatives you've considered...

There seems to be no easy way to shim the node-crypto library. As web-crypto async it also requires the interfaces to update which makes the changes needed fairly large.