Support org-roam v2 version

[guidao]

Support org-roam v2 version

[NicolasPetton]

@guidao has org-roam v2 been released already?

[sinnpi]

An Alpha has been released: https://github.com/org-roam/org-roam/releases/tag/2.0.0a1

v2 is under active development: https://github.com/org-roam/org-roam/tree/v2

[CUexter]

It is now released. I am looking forward to adding this in org-roam v2. This looks so cool.

[mlemerre]

I second this, as org-roam v2 is the default in melpa now. Thanks for nroam!