Bump version

NEWS

+gcr 3.28.1:
+- system-prompter: Fix use of g_hash_table_lookup_extended [#9]
+- Updated translations
+
 gcr 3.28.0:
 - Fix year 2038 workaround in ASN.1 decoder [#787963]
 - Fix test errors when ssh-keygen is not found

configure.ac

 
 m4_define([gcr_major], [3])
 m4_define([gcr_minor], [28])
-m4_define([gcr_micro], [0])
+m4_define([gcr_micro], [1])
 
 AC_PREREQ([2.63])
 AC_INIT([gcr], [gcr_major.gcr_minor.gcr_micro],