index: also send `file` upon `/create` to fix re-syncs

lib/index.js

@@ -52,10 +52,11 @@ export default class Now extends EventEmitter {
         method: 'POST',
         body: {
           forceNew,
-          files: Array.from(this._files).map(([sha, { data }]) => {
+          files: Array.from(this._files).map(([sha, { data, name }]) => {
             return {
               sha,
-              size: Buffer.byteLength(data)
+              size: Buffer.byteLength(data),
+              file: toRelative(name, this._path),
             };
           })
         }