update CHANGES [skip ci]

Author: oesteban

CHANGES

@@ -1,6 +1,7 @@
 Upcoming release
 ================
 
+* ENH: Add elapsed_time and final metric_value to ants.Registration (https://github.com/nipy/nipype/pull/1985)
 * ENH: Improve terminal_output feature (https://github.com/nipy/nipype/pull/2209)
 * ENH: Simple interface to FSL std2imgcoords (https://github.com/nipy/nipype/pull/2209, prev #1398)
 * ENH: Centralize virtual/physical $DISPLAYs (https://github.com/nipy/nipype/pull/#2203)