更新JSON解析

src/core/http.ts

@@ -107,7 +107,7 @@ function request<T = any>(
     } = options
 
     const xhr = new XMLHttpRequest()
-    xhr.responseType = 'json'
+    xhr.responseType = 'text'
     xhr.withCredentials = withCredentials
     if (typeof timeout === 'number') {
         xhr.timeout = timeout
@@ -121,7 +121,7 @@ function request<T = any>(
             resolve({
                 status: xhr.status,
                 headers: parseResponseHeaders(xhr),
-                data: xhr.response,
+                data: JSON.parse(xhr.responseText),
             })
         })
         xhr.addEventListener('readystatechange', function () {