Bump version: 1.8.0.252-13c29 → 1.9.0

Change-Id: I6f8eccbccb73c6c094f13f2d4bdee931cf5b9010
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index cbbdcc0..a01189c 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -1,7 +1,7 @@
 # This is _NOT_ the library release version, it's an API version.
 # Please read chapter "Library interface versions" of the libtool documentation
 # before making any modifications: https://www.gnu.org/software/libtool/manual/html_node/Versioning.html
-LIBVERSION=19:0:1
+LIBVERSION=20:0:0
 
 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include
 AM_CFLAGS = -Wall $(TALLOC_CFLAGS)