Sodg::find_with_closure() must pass "self" to the closure

[yegor256]

At the moment it's impossible to get access to the graph from the closure (or I'm doing something wrong):

use sodg::Sodg;
let mut g = Sodg::empty();
g.add(0).unwrap();
g.add(1).unwrap();
g.bind(0, 1, "foo").unwrap();
assert!(g.find(0, "bar").is_err());
let v = g.find_with_closure(0, "bar", |v, a, b| {
  g.find(123, "hello"); // can't compile this!
  Ok("foo".to_string())
}).unwrap();
assert_eq!(1, v);

Let's make it possible somehow to access the graph from the closure. Maybe pass it as the 4th argument to the closure?

[yegor256]

@UARTman can you help?

[yegor256]

@rultor release, tag is 0.0.13

[rultor]

@rultor release, tag is 0.0.13

@yegor256 OK, I will release it now. Please check the progress here

[rultor]

@rultor release, tag is 0.0.13

@yegor256 Done! FYI, the full log is here (took me 3min)