Update to Wine 5.2. This includes the following changes:

• More compatible codepage mapping tables. [A]
• Support for using the null display driver as a real driver.
• Better UTF-8 support in the Resource and Message Compilers.
• Fixes for using ucrtbase as C runtime.
• Various bug fixes.

It also brings a significant number of changes to the packaging list,
notably due to [A].

Finally remove wine-staging and i386-wine-staging as conflicts since
those do not exist any longer. [1]

Submitted by: salvadore [1]