Fix up various flow issues.

migrations/1505044429557-add_cash_out_txs_published_at.js

@@ -0,0 +1,14 @@
+var db = require('./db')
+
+exports.up = function (next) {
+  const sql = [
+    'alter table cash_out_txs add column published_at timestamptz',
+    'alter table cash_out_txs rename column confirmation_time to confirmed_at'
+  ]
+
+  db.multi(sql, next)
+}
+
+exports.down = function (next) {
+  next()
+}