Update package.json

Author: kyuss

package.json

@@ -9,7 +9,7 @@
   "unpkg": "build/browser/filestack.min.js",
   "repository": "https://github.com/filestack/filestack-js",
   "author": "Filestack <filestack.com>",
-  "license": "Apache-2.0",
+  "license": "MIT",
   "files": [
     "src",
     "build"