SetUp() should provide a way to end the goroutine

[rfay]

Expected Behavior

There shouldn't be running goroutines at exit.

Current Behavior

func (p *amplitudePlugin) Setup(config types.Config) {} does

go p.start(p.messageChannel)

The goroutine is still running on exit.

Possible Solution

• Provide a way to terminate the goroutine
• Return p.messageChannel so that it could be sent a message to terminate.

Steps to Reproduce

In any go program using analytics-go add

		defer func() {
			p := pprof.Lookup("goroutine")

			p.WriteTo(os.Stdout, 2)

			numGoroutines := runtime.NumGoroutine()
			printf("goroutines at exit of main()=%d", numGoroutines)
		}()

You'll see the running goroutine started by start()

Environment

• SDK Version: v1.0.1
• Go Version: go1.22.1
• OS Info: macOS 14