fix main file location. fix parse json

lib/DownloadTask.ts

@@ -100,8 +100,9 @@ export default class DownloadTask {
 
   tryParseJson (element) {
     try {
-      if (element)
+      if (typeof element === 'string')
         element = JSON.parse(element)
+
       return element
     } catch (e) {
       console.warn('DownloadTask tryParseJson', e)

package.json

@@ -24,7 +24,7 @@
       "name": "Elad Gil"
     }
   ],
-  "main": "index.js",
+  "main": "index.ts",
   "types": "index.d.ts",
   "files": [
     "README.md",