Version. Increase to '0.19.9'.

src/oatpp/core/base/Environment.hpp

@@ -36,7 +36,7 @@
 #include <stdexcept>
 #include <stdlib.h>
 
-#define OATPP_VERSION "0.19.8"
+#define OATPP_VERSION "0.19.9"
 
 typedef unsigned char v_char8;
 typedef v_char8 *p_char8;