Upgrade to Flow 0.71

app/utils/getDataTransferFiles.js

@@ -1,6 +1,8 @@
 // @flow
-export default function getDataTransferFiles(event: SyntheticEvent) {
+export default function getDataTransferFiles(event: SyntheticEvent<*>): File[] {
   let dataTransferItemsList = [];
+
+  // $FlowFixMe
   if (event.dataTransfer) {
     const dt = event.dataTransfer;
     if (dt.files && dt.files.length) {
@@ -10,6 +12,8 @@ export default function getDataTransferFiles(event: SyntheticEvent) {
       // but Chrome implements some drag store, which is accesible via dataTransfer.items
       dataTransferItemsList = dt.items;
     }
+
+    // $FlowFixMe
   } else if (event.target && event.target.files) {
     dataTransferItemsList = event.target.files;
   }

app/utils/uploadFile.js

@@ -27,6 +27,7 @@ export const uploadFile = async (
     formData.append(key, data.form[key]);
   }
 
+  // $FlowFixMe
   if (file.blob) {
     // $FlowFixMe
     formData.append('file', file.file);