Update to image 0.24

[vadixidav]

This crate seems to be out of date with image (including on master).

[laris]

error[E0308]: mismatched types
  --> src/main.rs:89:15
   |
89 |     threshold(&img_luma, 230);
   |               ^^^^^^^^^ expected struct `image::buffer_::ImageBuffer`, found struct `ImageBuffer`
   |
   = note: expected reference `&image::buffer_::ImageBuffer<image::color::Luma<u8>, Vec<u8>>`
              found reference `&ImageBuffer<Luma<u8>, Vec<u8>>`
   = note: perhaps two different versions of crate `image` are being used?

For more information about this error, try `rustc --explain E0308`.

[laris]

Could consider to upgrade to the dependent to image 0.24?
some API of image was changed.

pub fn crop(&mut self, x: u32, y: u32, width: u32, height: u32) -> DynamicImage
Return a cut-out of this image delimited by the bounding rectangle.

Note: this method does not modify the object, and its signature will be replaced with crop_imm()’s in the 0.24 release

[OvermindDL1]

The newer image also has some new functionality that did not exist before so backdating to use imageproc loses that capability as well.

Is someone making a PR for this or where is it being worked on? Is there some blocker?