polyfill for IE, add xhr.timeout feature support and responseType tests

[hthetiot]

• [x] IE use Object.keys polifyll for IE
• [x] add xhr.timeout feature support for proxyfied xhr
• [x] Fix Cannot send request with responseType = "arraybuffer" from IE
• [x] Implement responseType tests

[hthetiot]

Waiting for QA/Review from @BnTejaede. @dpwspoon already reviewed responseType change need timeout and other change with eye.