refactor: apply review suggestions

Co-authored-by: Robert Nagy <ronagy@icloud.com>

lib/client.js

@@ -268,7 +268,7 @@ class Client extends DispatcherBase {
 
     // HTTP/2
     this[kHTTP2Session] = null
-    this[kHTTP2SessionState] = {
+    this[kHTTP2SessionState] = !allowH2 ? null : {
       // streams: null, // Fixed queue of streams - For future support of `push`
       openStreams: 0, // Keep track of them to decide wether or not unref the session
       maxStreams: 100 // Max peerConcurrentStreams for a Node h2 server
@@ -388,11 +388,7 @@ class Client extends DispatcherBase {
 
         util.destroy(this[kHTTP2Session], err)
         this[kHTTP2Session] = null
-        this[kHTTP2SessionState] = {
-          maxStreams,
-          openStreams: 0
-          // streams: null // Fixed queue of streams
-        }
+        this[kHTTP2SessionState] = null
       }
 
       if (!this[kSocket]) {
@@ -1198,7 +1194,7 @@ async function connect (client) {
     })
 
     if (client.destroyed) {
-      util.destroy(socket.on('error', () => { }), new ClientDestroyedError())
+      util.destroy(socket.on('error', () => {}), new ClientDestroyedError())
       return
     }
 
@@ -1410,7 +1406,7 @@ function _resume (client, sync) {
       return
     }
 
-    if ((socket.destroyed || socket[kWriting] || socket[kReset] || socket[kBlocking])) {
+    if (socket.destroyed || socket[kWriting] || socket[kReset] || socket[kBlocking]) {
       return
     }