dump.h: bump `RITE_BINARY_MAJOR_VER` to `03`.

Since we have added several new instructions.

include/mruby/dump.h

@@ -54,7 +54,7 @@ MRB_API mrb_irep *mrb_read_irep_buf(mrb_state*, const void*, size_t);
 /* Binary Format Version Major:Minor */
 /*   Major: Incompatible to prior versions */
 /*   Minor: Upper-compatible to prior versions */
-#define RITE_BINARY_MAJOR_VER          "02"
+#define RITE_BINARY_MAJOR_VER          "03"
 #define RITE_BINARY_MINOR_VER          "00"
 #define RITE_BINARY_FORMAT_VER         RITE_BINARY_MAJOR_VER RITE_BINARY_MINOR_VER
 #define RITE_COMPILER_NAME             "MATZ"