update version in cargo

[ldicarlo]

Hey
Thank you for this project!
I think you did not update the version in cargo, as the last version does not expose the 12.48"
https://docs.rs/epd-waveshare/latest/epd_waveshare/#modules
Could you update it? (I'll import locally in the meantime)
Thank you

[MicroPanda123]

+1
I was banging my head against the wall trying to find out why I couldn't get Image to work using crates version, only to realize that example uses version that has not been yet released, so I would also like that to be updated.
thanks