Bump version to 3.0.4

hsbt · hsbt · commit aeb7e1a0bde6 · 2022-12-05T17:01:57.000+09:00
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
@@ -12,7 +12,7 @@
 
 **********************************************************************/
 
-#define STRINGIO_VERSION "3.0.3"
+#define STRINGIO_VERSION "3.0.4"
 
 #include "ruby.h"
 #include "ruby/io.h"
