Update META

Increase the version to 2.3.99 to indicate the master branch is
newer than the 2.3.x release.  This ensures packages built from
master branch are considered to be newer than the last release.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

META

@@ -1,8 +1,8 @@
 Meta:          1
 Name:          zfs
 Branch:        1.0
-Version:       2.3.0
-Release:       rc1
+Version:       2.3.99
+Release:       1
 Release-Tags:  relext
 License:       CDDL
 Author:        OpenZFS