enum.diff

diff --git a/lib/Minion/Backend/Pg.pm b/lib/Minion/Backend/Pg.pm
index 145962c..41d6975 100644
--- a/lib/Minion/Backend/Pg.pm
+++ b/lib/Minion/Backend/Pg.pm
@@ -731,3 +731,9 @@ alter table minion_jobs add column attempts int not null default 1;
 
 -- 6 up
 drop index minion_jobs_state_idx;
+
+-- 7 up
+create type minion_state as enum ('inactive', 'active', 'finished', 'failed');
+alter table minion_jobs alter column state set default 'inactive'::minion_state;
+alter table minion_jobs
+  alter column state type minion_state using state::minion_state;