Bump versions up to 0.12.99 since a 0.12 release was just created.
diff --git a/configure.ac b/configure.ac
index 48c8e5f..c50f81b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 AC_PREREQ(2.52)
 
 # Process this file with autoconf to produce a configure script.
-AC_INIT([json-c], 0.11.99, [json-c@googlegroups.com])
+AC_INIT([json-c], 0.12.99, [json-c@googlegroups.com])
 
 AM_INIT_AUTOMAKE