WIP: initial prototype

- Added client.close API
- Added resurrect event
- Improved resurrect ping strategy
- Updated types

lib/Connection.js

@@ -64,7 +64,7 @@ class Connection {
         ended = true
         this._openRequests--
         request.abort()
-        callback(new TimeoutError('Request timed out', params))
+        callback(new TimeoutError('Request timed out', params), null)
       }
     })
 
@@ -73,7 +73,7 @@ class Connection {
       if (ended === false) {
         ended = true
         this._openRequests--
-        callback(err)
+        callback(err, null)
       }
     })
 
@@ -95,7 +95,7 @@ class Connection {
         if (err != null && ended === false) {
           ended = true
           this._openRequests--
-          callback(err)
+          callback(err, null)
         }
       })
     } else {
@@ -152,6 +152,7 @@ class Connection {
       pathname: url.pathname,
       path: '',
       href: url.href,
+      origin: url.origin,
       port: url.port,
       headers: this.headers,
       auth: !!url.username === true || !!url.password === true