v1.2.4

change order of auto detection

Since the SHT3x and SHT4x share addresses, there's an issue when an SHT4x is
connected to the bus and we're probing for an SHT3x: The result is that the
first reading of the SHT4x is off.

The other direction works (probing for a 4x when a 3x is connected), as such
we're simply changing the order of detection