Bump shakmaty from 0.18.0 to 0.19.0

Bumps [shakmaty](https://github.com/niklasf/shakmaty) from 0.18.0 to 0.19.0.
- [Release notes](https://github.com/niklasf/shakmaty/releases)
- [Commits](niklasf/shakmaty@v0.18.0...v0.19.0)

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -16,7 +16,7 @@ clap = "2.33.3"
 derive_more = "0.99.11"
 futures = "0.3.13"
 rustyline = "8.0.0"
-shakmaty = "0.18.0"
+shakmaty = "0.19.0"
 smol = "1.2.5"
 structopt = "0.3.21"
 tracing = "0.1.25"

src/position.rs

@@ -11,7 +11,7 @@ use proptest::prelude::*;
 /// The current position on the chess board.
 ///
 /// This type guarantees that it only holds valid positions.
-#[derive(DebugCustom, Display, Default, Clone /*, Hash*/)]
+#[derive(DebugCustom, Display, Default, Clone)]
 #[cfg_attr(test, derive(proptest_derive::Arbitrary))]
 #[debug(fmt = "Position(\"{}\")", self)]
 #[display(fmt = "{}", "sm::fen::FenOpts::new().promoted(true).fen(setup)")]
@@ -103,17 +103,9 @@ impl PartialEq for Position {
     }
 }
 
-// FIXME: merged upstream
 impl Hash for Position {
     fn hash<H: Hasher>(&self, state: &mut H) {
-        let fen = sm::fen::Fen::from_setup(&self.setup);
-
-        fen.board.hash(state);
-        fen.turn.hash(state);
-        fen.castling_rights.hash(state);
-        fen.ep_square.hash(state);
-        fen.halfmoves.hash(state);
-        fen.fullmoves.hash(state);
+        sm::fen::Fen::from_setup(&self.setup).hash(state);
     }
 }