Update README.md
Update release dates
@@ -66,8 +66,13 @@ Release Number | Date | History
1.6.19 | 2013-11-15 | [Portable UPnP SDK][Portable UPnP SDK]
1.6.20 | 2016-07-07 | [Portable UPnP SDK][Portable UPnP SDK]
1.6.21 | 2016-12-21 | [Portable UPnP SDK][Portable UPnP SDK]
-1.6.22 | 2017-??-?? |
-1.8.0 | 2017-??-?? |
+1.6.22 | 2017-05-30 | [Portable UPnP SDK][Portable UPnP SDK]
+1.6.23 | 2017-11-19 | [Portable UPnP SDK][Portable UPnP SDK]
+1.6.24 | 2017-11-19 | [Portable UPnP SDK][Portable UPnP SDK]
+1.8.0 | 2017-01-04 | [Portable UPnP SDK][Portable UPnP SDK]
+1.8.1 | 2017-05-24 | [Portable UPnP SDK][Portable UPnP SDK]
+1.8.2 | 2017-11-12 | [Portable UPnP SDK][Portable UPnP SDK]
+1.8.3 | 2017-11-12 | [Portable UPnP SDK][Portable UPnP SDK]
[UPnP SDK for Linux]: https://sourceforge.net/projects/upnp/
[Portable UPnP SDK]: https://sourceforge.net/projects/pupnp/
