Example project compilation error

[sidan5]

[Didami]

Issue #8 led to #10. @Ezaldeen99 merged pull request, but didn't update the example. These changes were meant to make optional unwrapping safer. The only missing parts in the example are the do, try, and catch statements. Replace them with the following code:

let image = UIImage(named: "child")
inputImage.image = image

let backgroundRemoval = BackgroundRemoval()
do {
    outputImage.image = try backgroundRemoval.removeBackground(image: image!)
    segmentedImage.image = try backgroundRemoval.removeBackground(image: image!, maskOnly: true)
} catch {
    print(error)
}