Add fix for node-commander 9

Closes: #1008511

debian/patches/fix-for-commander-9.patch

+Description: fix for node-commander 9
+Author: Yadd <yadd@debian.org>
+Bug-Debian: https://bugs.debian.org/1008511
+Forwarded: https://github.com/jupyterhub/configurable-http-proxy/issues/384
+Last-Update: 2022-03-29
+
+--- a/bin/configurable-http-proxy
++++ b/bin/configurable-http-proxy
+@@ -114,6 +114,7 @@
+     process.exit(1);
+   }
+   previous[headerParts[0]] = headerParts[1];
++  return previous;
+ }
+ 
+ cli.parse(process.argv);

debian/patches/series

 fix-prom-test.patch
 dont-install-example.patch
 update-to-ws-8.patch
+fix-for-commander-9.patch