configure: post-release version bump

configure.ac

@@ -7,10 +7,10 @@ dnl Seed the release notes with `git-shortlog-with-prs <previous-release>..`. Th
 dnl `git-evtag` to create the tag and push it. Finally, create a GitHub release and attach
 dnl the tarball from `make dist`.
 m4_define([year_version], [2020])
-m4_define([release_version], [8])
+m4_define([release_version], [9])
 m4_define([package_version], [year_version.release_version])
 AC_INIT([libostree], [package_version], [walters@verbum.org])
-is_release_build=yes
+is_release_build=no
 AC_CONFIG_HEADER([config.h])
 AC_CONFIG_MACRO_DIR([buildutil])
 AC_CONFIG_AUX_DIR([build-aux])