Websocket Headers & Meaningful Error Message

• fixed proper propagation of websocket headers, they were not forwarded from the origin request up to the punchmole target url
• if the local target url isn't available (ECONNREFUSED) there is now a more clear error message presented to the user accessing the url
• extended the error message in other cases with the error code which is more meaningful than "AggregateError"

1.1.3

• changed the default console logging to just info level messages to reduce noise and have better traceable visibility of requests
• introduced DEBUG=true punchmole as new environment flag which enables verbose logging of requests for the punchmole client
• bumped dependencies due to high severity vulnerabilities
• fixed an issue with websocket ping/pong while the websocket connection is in connecting state
• updated README.md with shared experience of running punchmole in production-like scenarios with larger amount of requests