Get rid of source-map-support

[timotheeguerin]

Node support
Node >=12.12.0
This package is no longer required as Node 12.12.0 introduced the --enable-source-maps flag. (unless you're using the vm module, as --enable-source-maps does not work with vm.runInThisContext).

Can we do that?

Right now its nice that it just tries to enable it but having to pass a node flag might be quite a bit more tedious