Update Vendure provider to latest API changes (#352)

Relates to #349

framework/vendure/utils/fragments/search-result-fragment.ts

@@ -0,0 +1,24 @@
+export const searchResultFragment = /* GraphQL */ `
+  fragment SearchResult on SearchResult {
+    productId
+    productName
+    description
+    description
+    slug
+    sku
+    currencyCode
+    productAsset {
+      id
+      preview
+    }
+    priceWithTax {
+      ... on SinglePrice {
+        value
+      }
+      ... on PriceRange {
+        min
+        max
+      }
+    }
+  }
+`