goroutine leak

[kamilsk]

• https://github.com/kamilsk/retry/blob/master/channel.go#L42-L46
• https://github.com/kamilsk/retry/blob/master/context.go#L11-L12
• https://github.com/kamilsk/retry/blob/master/channel.go#L52-L63 - channel + cancel, because time.After is bad
• https://github.com/kamilsk/retry/blob/master/channel.go#L35-L49 - the same as above, because we don't need to listen signal when work is done
• investigate more

[kamilsk]

https://go101.org/article/concurrent-common-mistakes.html