Downgrade builder

Author: witchent

package.json

@@ -16,7 +16,7 @@
  "backbone-indexeddb": "^0.0.13",
  "bluebird": "^3.7.2",
  "bytebuffer": "^5.0.1",
- "electron-builder": "22.5.1",
+ "electron-builder": "20.39.0",
  "indexeddbshim": "^6.1.0",
  "jquery-deferred": "^0.3.1",
  "mkdirp": "^1.0.4",