Update Ruby versions

Author: anitagraham

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
       matrix:
         database: [ mysql, postgresql ]
         extension: [ core, dragonfly, images, pages, resources ]
-        ruby: [ "2.7.x", "2.6.x" ]
+        ruby: [ "2.7.2", "2.6.6" ]
       fail-fast: false
       max-parallel: 10
     runs-on: ubuntu-latest

images/app/presenters/refinery/admin/images/image_presenter.rb

@@ -27,6 +27,9 @@ def initialize(image, view_format, context)
           @view = view_format
         end
 
+        def self.collection(images, context)
+          images.map { |image| new(image, context) }
+        end
         def to_html(stripe=true )
           stripe_class = stripe ? 'on' : 'on-hover'
           tag.li id: "image_#{image.id}", class: stripe_class do