Bumb version to 0.9.9

Author: QueensGambit

engine/src/constants.h

@@ -59,7 +59,7 @@ const string engineName = "OpenSpielAra";
 const string engineName = "ClassicAra";
 #endif
 
-const string engineVersion = "0.9.8";
+const string engineVersion = "0.9.9";
 #ifdef MODE_CRAZYHOUSE
 const string engineAuthors = "Johannes Czech, Moritz Willig, Alena Beyer and CrazyAra developers (see AUTHORS file)";
 #elif defined MODE_LICHESS