updated for version 7.3.013
Problem:    Dynamic loading with Ruby doesn't work for 1.9.2.
Solution:   Handle rb_str2cstr differently.  Also support dynamic loading on
            Unix. (Jon Maken)
diff --git a/src/version.c b/src/version.c
index 0b5d7fa..7f6aa67 100644
--- a/src/version.c
+++ b/src/version.c
@@ -715,6 +715,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    13,
+/**/
     12,
 /**/
     11,