Update version number

Author: chad-iris

libmseed.h

@@ -28,7 +28,7 @@
 extern "C" {
 #endif
 
-#define LIBMSEED_VERSION "3.0.1"    //!< Library version
+#define LIBMSEED_VERSION "3.0.9"    //!< Library version
 #define LIBMSEED_RELEASE "2021.234" //!< Library release date
 
 /** @defgroup io-functions File and URL I/O */