Fix Parse File upload problem via ajax

[miconblog]

Before this PR:

var parseFile = new Parse.File('filename', file);
parseFile.save().then((f)=>{
    console.log(f.toJSON())  // {__type: "File", name: undefined, url: undefined}
});

i think it is a bug and related this issue: #558
RESTController.ajax method was return with response object, you can see that Implementation in here and here

[flovilmart]

The bug you are describing should only be present on the master branch, and only since a few days ago. Ca you confirm ?

[miconblog]

yes, sure!

[flovilmart]

How is it related to the bug you are describing? how did you encounter this issue in the first place?

[codecov]

Codecov Report

Merging #628 into master will increase coverage by 0.38%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #628      +/-   ##
==========================================
+ Coverage   84.59%   84.98%   +0.38%     
==========================================
  Files          48       48              
  Lines        3850     3850              
  Branches      871      871              
==========================================
+ Hits         3257     3272      +15     
+ Misses        593      578      -15

Impacted Files	Coverage Δ
src/ParseFile.js	94.28% <100%> (+14.28%)	⬆️

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[miconblog]

yesterday I upgrade the SDK from 1.11.1 to 2.0 and i found this problem in my web project.

[flovilmart]

Excellent :) Thanks!