config.h: generate CROWN_VERSION with MAJOR, MINOR and PATCH

src/config.h

@@ -7,7 +7,13 @@
 
 #include "core/platform.h"
 
-#define CROWN_VERSION "0.1.2"
+#define CROWN_VERSION_MAJOR 0
+#define CROWN_VERSION_MINOR 1
+#define CROWN_VERSION_PATCH 2
+
+#define CROWN_VERSION CE_STRINGIZE(CROWN_VERSION_MAJOR) \
+	"." CE_STRINGIZE(CROWN_VERSION_MINOR) \
+	"." CE_STRINGIZE(CROWN_VERSION_PATCH)
 
 #ifndef CROWN_DEBUG
 	#define CROWN_DEBUG 0