README.md: Add note

Author: nhooyr

README.md

@@ -5,6 +5,11 @@
 
 websocket is a minimal and idiomatic WebSocket library for Go.
 
+> **note**: I haven't been responsive for questions/reports on the issue tracker but I do
+> read through and I don't believe there are any outstanding bugs. There are certainly
+> some nice to haves that I should merge in/figure out but nothing critical. I haven't
+> given up on adding new features and cleaning up the code further, just been busy.
+
 ## Install
 
 ```bash