Close database after migration

This is not 100% reliable as database connections are closed in a separate
thread according to the documentation:
- https://developer.mozilla.org/en-US/docs/Web/API/IDBDatabase/close
- https://stackoverflow.com/a/18639298
- 80c7a06d5c/backbone-indexeddb.js (L558-L565)

js/modules/migrations/migrations_0_database_with_attachment_data.js

@@ -146,5 +146,5 @@ const database = {
   migrations,
 };
 
-exports.run = ({ Backbone } = {}) =>
-  runMigrations({ Backbone, database });
+exports.run = ({ Backbone, closeDatabase } = {}) =>
+  runMigrations({ Backbone, closeDatabase, database });