feat(gatsby-transformer-sharp): expose sizes argument for fluid query (#8466)

* Expose sizes

* Allow querying presentationWidth

Author: stefanprobst

packages/gatsby-transformer-sharp/src/extend-node-type.js

@@ -216,6 +216,8 @@ const fluidNodeType = ({
         sizes: { type: GraphQLString },
         originalImg: { type: GraphQLString },
         originalName: { type: GraphQLString },
+        presentationWidth: { type: GraphQLInt },
+        presentationHeight: { type: GraphQLInt },
       },
     }),
     args: {
@@ -257,6 +259,10 @@ const fluidNodeType = ({
         type: GraphQLInt,
         defaultValue: 0,
       },
+      sizes: {
+        type: GraphQLString,
+        defaultValue: ``,
+      },
     },
     resolve: (image, fieldArgs, context) => {
       const file = getNodeAndSavePathDependency(image.parent, context.path)