Explicitly set display of source image to inline

This prevents CSS resets from overriding the `display` CSS property of
the source image, affecting the alignment of the source image.

Author: STOWouters

projects/ngx-image-cropper/src/lib/component/image-cropper.component.scss

@@ -13,6 +13,7 @@
     position: relative;
 
     img.ngx-ic-source-image {
+      display: inline;
       max-width: 100%;
       max-height: 100%;
       transform-origin: center;