Add handling for additional responseType 'blob'

changelog/unreleased/enhancement-resolve-type-blob

@@ -0,0 +1,5 @@
+Enhancement: Add blob resolveType
+
+We now support blob as resolveType for requests in addition to text and arrayBuffer.
+
+https://github.com/owncloud/owncloud-sdk/pull/1028

src/helperFunctions.js

@@ -345,6 +345,10 @@ class helpers {
               body = await res.arrayBuffer()
               break
 
+            case 'blob':
+              body = await res.blob()
+              break
+
             default:
               body = await res.text()
           }