display go test error if there is an error when running go test

At the moment its very basic and breaks spinner funcitonality but at
least the error is visible.

internal/app/rgt/commands/start.go

@@ -12,6 +12,7 @@ import (
 	"time"
 )
 
+//TODO: First run should happen at start - we dont need to wait for file change
 //TODO: BUGFIX when there is no library and io cant run go test ./... then the screen is empty
 
 //TODO: global configuration and per project configuration
@@ -60,7 +61,6 @@ var startCmd = &cobra.Command{
 					if event.Op&fsnotify.Write == fsnotify.Write {
 						//TODO: only watch on golang files and configure ability to ignore files
 						lastFileWritten = event.Name
-
 						// We want to start goroutine block it for 1-2-3 seconds
 						// And then listen to files - there might be many events for 1 file
 						// We are only interested in one last one
@@ -97,6 +97,8 @@ var startCmd = &cobra.Command{
 									log.Fatalf("incorrect test runner specified '%s' supported [go, gotestsum]", goTestRunner)
 								}
 
+								// Make sure we get the error
+								cmd.Stderr = os.Stderr
 								out, _ := cmd.Output()
 								s.Stop()
 								fmt.Println(string(out))