Update to 6.0.9: Add PostInterrupt plugin. Read HISTORY.md

- Add `PostInterrupt` plugin, useful for customization of the
**os.Interrupt** singal, before that Iris closed the server
automatically.

```go
iris.Plugins.PostInterrupt(func(s *Framework){
// when os.Interrupt signal is fired the body of this function will be
fired,
// you're responsible for closing the server with s.Close()

// if that event is not registered then the framework
// will close the server for you.

/* Do  any custom cleanup and finally call the s.Close()
remember you have the iris.Plugins.PreClose(func(s *Framework)) event
too
so you can split your logic in two logically places.
*/

})

```

.github/ISSUE_TEMPLATE.md

@@ -1,4 +1,4 @@
-- Version : **6.0.8**
+- Version : **6.0.9**
 
 - Operating System: