finch: update to version 0.12.1

Backport of /pull/354/.

Author: tlvu

birdhouse/config/finch/default.env

@@ -4,7 +4,7 @@
 # must use single quotes to avoid early expansion before overrides in env.local
 # are applied and must be added to the list of DELAYED_EVAL.
 
-export FINCH_VERSION=0.9.2
+export FINCH_VERSION=0.12.1
 export FINCH_IMAGE="birdhouse/finch:version-${FINCH_VERSION}"
 
 # This tells the postgres service to create a database on startup