[v3] export SetIcon method (#3147)

* export `SetIcon` method

* add change log

mkdocs-website/docs/en/changelog.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [darwin] add getPrimaryScreen/getScreens to impl by @tmclane in [#2618](https://github.com/wailsapp/wails/pull/2618)
 - [linux] add onKeyPress logic to convert linux keypress into an accelerator @[Atterpac](https://github.com/Atterpac) in[#3022](https://github.com/wailsapp/wails/pull/3022])
 - [linux] add task `run:linux` by [@marcus-crane](https://github.com/marcus-crane) in [#3146](https://github.com/wailsapp/wails/pull/3146)
+- export `SetIcon` method by  @almas1992 in [PR](https://github.com/wailsapp/wails/pull/3147)
 
 ### Fixed
 

v3/pkg/application/application.go

@@ -611,6 +611,12 @@ func (a *App) Quit() {
 	})
 }
 
+func (a *App) SetIcon(icon []byte) {
+	if a.impl != nil {
+		a.impl.setIcon(icon)
+	}
+}
+
 func (a *App) SetMenu(menu *Menu) {
 	a.ApplicationMenu = menu
 	if a.impl != nil {