FormData support added

fetch/fetch.d.ts

@@ -54,8 +54,8 @@ declare module "fetch" {
 /*
         arrayBuffer(): Promise<ArrayBuffer>;
         blob(): Promise<Blob>;
-        formData(): Promise<FormData>;
 */
+        formData(): Promise<FormData>;
         json(): Promise<any>;
         text(): Promise<string>;
     }

fetch/fetch.js

@@ -110,7 +110,7 @@
     }
 
     var support = {
-        blob: 'FileReader' in self && 'Blob' in self && (function () {
+        blob: 'FileReader' in global && 'Blob' in global && (function () {
             try {
                 new Blob();
                 return true
@@ -118,7 +118,7 @@
                 return false
             }
         })(),
-        formData: 'FormData' in self
+        formData: 'FormData' in global
     }
 
     function Body() {