fix(Currency Code): add the missing the currency codes.

server/src/database/migrations/20200105195823_create_manual_journals_table.js

@@ -6,6 +6,7 @@ exports.up = function(knex) {
     table.string('reference').index();
     table.string('journal_type').index();
     table.decimal('amount', 13, 3);
+    table.string('currency_code', 3);
     table.date('date').index();
     table.string('description');
     table.date('published_at').index();