bump version for release

CHANGES.md

 # eduGAIN Access Check Changelog
 
-## Version 1.2
+## Version 1.2 (04/02/2019)
 
 * process metadata offline asynchronously
 * allow optional pre-authentication

configure.ac

 AC_PREREQ(2.59)
-AC_INIT([Access Check Manager], 1.1.1)
+AC_INIT([Access Check Manager], 1.2)
 AM_INIT_AUTOMAKE([foreign])
 AC_REQUIRE_AUX_FILE([tap-driver.sh])
 AC_PROG_LN_S