chore: export wretch (#27)

Author: roccomuso

index.js

@@ -5,5 +5,6 @@
 const fetch = require('./fetch')
 const WebSocket = require('./websocket')
 const fetchival = require('./fetchival')
+const wretch = require('./wretch')
 
-module.exports = { fetch, WebSocket, fetchival }
+module.exports = { fetch, WebSocket, fetchival, wretch }