Update Rhymen/go-whatsapp vendor (#876)

vendor/github.com/Rhymen/go-whatsapp/session.go

@@ -100,6 +100,14 @@ func (wac *Conn) SetClientName(long, short string) error {
 	return nil
 }
 
+/*
+SetClientVersion sets WhatsApp client version
+Default value is 0.3.3324
+*/
+func (wac *Conn) SetClientVersion(major int, minor int, patch int) {
+	waVersion = []int{major, minor, patch}
+}
+
 /*
 Login is the function that creates a new whatsapp session and logs you in. If you do not want to scan the qr code
 every time, you should save the returned session and use RestoreWithSession the next time. Login takes a writable channel
@@ -187,6 +195,8 @@ func (wac *Conn) Login(qrChan chan<- string) (Session, error) {
 	var resp2 []interface{}
 	select {
 	case r1 := <-s1:
+		wac.loginSessionLock.Lock()
+		defer wac.loginSessionLock.Unlock()
 		if err := json.Unmarshal([]byte(r1), &resp2); err != nil {
 			return session, fmt.Errorf("error decoding qr code resp: %v", err)
 		}