Bump to 4.9.0 because of significant C API changes to support Python 3.10.
/* Module version information. */
#define MOD_WSGI_MAJORVERSION_NUMBER 4
-#define MOD_WSGI_MINORVERSION_NUMBER 8
+#define MOD_WSGI_MINORVERSION_NUMBER 9
#define MOD_WSGI_MICROVERSION_NUMBER 0
-#define MOD_WSGI_VERSION_STRING "4.8.0"
+#define MOD_WSGI_VERSION_STRING "4.9.0"
/* ------------------------------------------------------------------------- */
