Updates project version and removes legacy code

Updates the project version to prepare for a new release.

Removes the legacy projectile prediction engine, which is no longer needed.

source/projectile_prediction/proj_pred_engine_legacy.cpp

@@ -1,8 +0,0 @@
-#include "omath/projectile_prediction/proj_pred_engine_legacy.hpp"
-#include <cmath>
-#include <omath/angles.hpp>
-
-namespace omath::projectile_prediction
-{
-
-} // namespace omath::projectile_prediction