Fix filename and function signature

sequence_dummy.go → sequences_dummy.go

@@ -4,8 +4,9 @@ package sequences
 
 import (
 	"fmt"
+	"syscall"
 )
 
-func EnableVirtualTerminalProcessing() error {
+func EnableVirtualTerminalProcessing(stream syscall.Handle, enable bool) error {
 	return fmt.Errorf("windows only package")
 }