execPath still requires the use of deno

[paoloricciuti]

https://github.com/denoland/node_shims/blob/094b9cfa50aac59e7b113816ddd8bbda40493194/packages/shim-deno/src/deno/stable/functions/execPath.ts#L5

I'm trying to build a cli with Deno and cross publish to npm using dnt but the cli works only if deno is installed and the above LOC should be the culprit. It tryes to find deno and throws if there's no deno installed.

Can i do something about this?