Bump version: 0.4.0.21-60fd-dirty → 0.5.0

libosmotrau library version in debian package was wrong, fix it while
releasing.

Change-Id: I399618c7353a4150e3d571758b522dd2e9d9724f
diff --git a/src/Makefile.am b/src/Makefile.am
index 7395d17..ab42d38 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,7 @@
 # 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
 ABIS_LIBVERSION=6:0:0
-TRAU_LIBVERSION=2:0:0
+TRAU_LIBVERSION=3:0:1
 
 AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
 AM_CFLAGS= -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(COVERAGE_CFLAGS)