message: FEAT: Add Hash impl for Time
diff: @@ -4,7 +4,7 @@ use visit::IntoNeighbors;
  use visit::{VisitMap, Visitable};
  /// Strictly monotonically increasing event time for a depth first search.
  -#[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Default)]
  +#[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Default, Hash)]
  pub struct Time(pub usize);
  /// A depth first search (DFS) visitor event.
  