[bug] `path.join('', 'a')` returns `"/a"` instead of `"a"`

[alinnert]

Currently, Tauri's path.join('', 'a') returns "/a" which is an unexpected absolute path. Node's version of this function however returns "a" and I think that's correct. It looks like '' gets treated as a valid path segment and connected with 'a' into '<emptystring>/a' instead of being filtered. You can work around this issue by replacing '' with '.' though which I guess gets concatenated to './a' and then normalized to just 'a'.