fix 'attempt to negate with overflow'

src/logic/move.rs

@@ -74,10 +74,10 @@ impl Move {
             // if this board results in the opponent winning, MAJORLY negatively weigh this move
             // NOTE! this branch isn't completely deleted because if so, the bot wouldn't make a move.
             // We shouldn't prune branches because we still need to always react to the opponent's moves
-            return i64::MIN;
+            return i64::MIN + 1;
         } else if self.winner == Winner::Player(agent_color) {
             // results in a win for the agent
-            return i64::MAX;
+            return i64::MAX - 1;
         } else if self.winner == Winner::Tie {
             // idk what a Tie should be valued?
             return 0;