Bump version to 0.0.4.

Author: klorfmorf

src/main/main.cpp

@@ -37,7 +37,7 @@
 
 #include "../../lib/rt64/src/contrib/stb/stb_image.h"
 
-const std::string version_string = "0.0.3-dev";
+const std::string version_string = "0.0.4-dev";
 
 template<typename... Ts>
 void exit_error(const char* str, Ts ...args) {