Add ztrue/shutdown in utils (#2684)

README.md

@@ -1780,6 +1780,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * [robustly](https://github.com/VividCortex/robustly) - Runs functions resiliently, catching and restarting panics.
 * [scan](https://github.com/blockloop/scan) - Scan golang `sql.Rows` directly to structs, slices, or primitive types.
 * [serve](https://github.com/syntaqx/serve) - A static http server anywhere you need.
+* [shutdown](https://github.com/ztrue/shutdown) - App shutdown hooks for `os.Signal` handling.
 * [silk](https://github.com/chrispassas/silk) - Read silk netflow files.
 * [sliceconv](https://github.com/Henry-Sarabia/sliceconv) - Slice conversion between primitive types.
 * [slicer](https://github.com/leaanthony/slicer) - Makes working with slices easier.