Update prettier to latest. Remove tslint (#1641)

* Rev up prettier

* Reformat

* Remove deprecated tslint

* Remove call to tslint and update package-lock.json

src/Explorer/Panes/UploadItemsPane/UploadItemsPane.tsx

@@ -41,7 +41,7 @@ export const UploadItemsPane: FunctionComponent = () => {
         (error: Error) => {
           const errorMessage = getErrorMessage(error);
           setFormError(errorMessage);
-        }
+        },
       )
       .finally(() => {
         setIsExecuting(false);