Bump REGION_VERSION to 1.0.3 (#1324)

This is to match the RP version information shown in the README for the
master branch.

Author: janakj

src/mac/region/Region.h

@@ -72,9 +72,9 @@ extern "C"
 #ifndef REGION_VERSION
 /*!
  * Regional parameters version definition.
- * RP002-1.0.1
+ * RP002-1.0.3
  */
-#define REGION_VERSION                              0x02010001
+#define REGION_VERSION                              0x02010003
 #endif