Optional local dependency on async-container-supervisor.

Author: ioquatix

gems.rb

@@ -11,6 +11,7 @@
 # gem "async-http", path: "../async-http-native-io"
 # gem "openssl", git: "https://github.com/ruby/openssl.git"
 # gem "async-container", path: "../async-container"
+# gem "async-container-supervisor", path: "../async-container-supervisor"
 # gem "async-websocket", path: "../async-websocket"
 # gem "async-http", path: "../async-http"
 # gem "async-http-cache", path: "../async-http-cache"