Release v1.21.0

[piotrpio]

Changelog

Added

• ConnectHandler connect option to detect that initial connection was established. This is especially useful when combined with RetryOnFailedConnect ([ADDED] ConnectHandler invoked on initial successful connect #1133 )
• IgnoreAuthErrorAbort connect option to prevent aborting reconnect attempts after receiving the same authentication error twice ([ADDED] IgnoreAuthErrorAbort option on Connect #1141)
• SkipTLSHandshake option to CustomDialer. SkipTLSHandshake method can be implemented on a custom dialer to prevent TLS handshake if not needed (Add SkipTLSHandshake optional function to CustomDialer #1147)
• KV:
  • Return ErrKeyExists error when attempting to Create() a KV pair for an existing key (Add ErrKeyExists on kv.Create #1135, Add ErrKeyExists that is compatible with errors.Is on kv.Create #1136)
• JetStream:
  • Add ErrLeadershipChanged error, returned when consumer leadership has changed during a pull request on a consumer (Provide a way to handle 409 Leadership Changed errors in client #1151)

Improved

• Remove deprecated usages of io/ioutil (chore: remove deprecated usage of "io/ioutil" #1150)
• Remove experimental notice from KV implementation (Remove experimental notice from KeyValue #1154)

[Jarema]

LGTM

[coveralls]

Coverage increased (+0.01%) to 85.862% when pulling b8a5ede on release/v1.21.0 into 7ca331a on main.