Adding support for Image Crop Ratio Dimension Support & UpScale to GetCropUrl & More Tests

Updated ImageProcessor to v1.8.8 and ImageProcessor.Web to v3.2.2
Added support for Height and Width Ratio's to GetCropUrl
Added parameter for upScale to GetCropUrl
Added tests for Ratio options and some further general cropping tests

Many thanks to James M South for adding the features to ImageProcessor to support these options!