Set version to 1.2.1.
Fixes can't select tab.
Fixes wrong calculation when discount was present.
Changes sales returns storage from `PenerimaanBarang` into a new `ReturFaktur`.
Set version to 1.3.
Allow add new customer from sales data entry.
Allow user to select whether to print due date or not in  sales's invoice.
Treats payment by giro as final.
Create domain class and screen for transaction categories (`KategoriKas`).
Create domain class and screen for cash transactions (`TransaksiKas`).
Changes `JENIS_TRANSAKSI_KAS` from enumartion into an entity (`JenisTransaksiKas`).
Add new report `Laporan Transaksi Kas`.
Add feature to refresh monthly cash balance.
Add `KlaimTambahBayaran` and `KlaimTukarUang`.