C-CUSTOM-TYPE: these may be okay but we should be mindful of future changes (device-specific timeout options, 10-bit addresses)

[bugadani]

• timeout field in Config is an Option
• address parameter in write, read, write_read and transaction is a u8

[bjoernQ]

👍 for address we definitely can't keep u8 - should we do it like embedded-hal and have it <A: AddressMode = SevenBitAddress> or have an enum? Enum would be more explicit but also more annoying - and implementing the embedded-hal traits might be annoying

Not sure about timeout - given the docs already need to explain the different behavior of None depending on the target device this might call for being more explicit (the u32 already made users wonder what the unit of measurement is)