Merge branch 'feature/ISTWCMS-4872-ebremner-thumbnail-image-gallery' into '1.0.x'

ISTWCMS-4872: adding image style for image gallery square

See merge request !13

config/install/image.style.uw_is_image_gallery_square.yml

+langcode: en
+status: true
+dependencies: {  }
+name: uw_is_image_gallery_square
+label: 'Image gallery square'
+effects:
+  8baad3f1-8f51-4f91-9d3b-f848a2d81f56:
+    uuid: 8baad3f1-8f51-4f91-9d3b-f848a2d81f56
+    id: image_scale_and_crop
+    weight: 1
+    data:
+      width: 400
+      height: 400
+      anchor: center-center
+pipeline: ''