show Quantity Unit in Product sensor as string.

[saya6k]

Hi, I've been working on making lovelace settings to show dashboard like grocy app.

In individual product sensor, it's showing quantity unit id so I should define id to string in Home Assistant once again.

I wish I can get a quantity unit as string.

[Anrolosia]

I pushed an update (v0,13,0) to add both qty_unit for purchase and store.