Increment version to 0.24.0 draft

Main branch is now 0.24.0 draft version.

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: I053fc2f87c05e3237c10a8d41b1833591087651a
diff --git a/python/tosa_serializer.py b/python/tosa_serializer.py
index c250305..6915c83 100644
--- a/python/tosa_serializer.py
+++ b/python/tosa_serializer.py
@@ -37,9 +37,9 @@
 
 # Keep version number in sync with the version default value with schema/tosa.fbs
 TOSA_VERSION_MAJOR = 0
-TOSA_VERSION_MINOR = 23
+TOSA_VERSION_MINOR = 24
 TOSA_VERSION_PATCH = 0
-TOSA_VERSION_DRAFT = False
+TOSA_VERSION_DRAFT = True
 TOSA_VERSION = [TOSA_VERSION_MAJOR,
                 TOSA_VERSION_MINOR,
                 TOSA_VERSION_PATCH,