Run gofumpt on the project

backend/windows/smtc.go

@@ -17,8 +17,10 @@ import (
 	"golang.org/x/sys/windows"
 )
 
-type SMTCPlaybackState int
-type SMTCButton int
+type (
+	SMTCPlaybackState int
+	SMTCButton        int
+)
 
 const (
 	// constants from smtc.h in github.com/supersonic-app/smtc-dll

backend/windows/smtc_unsupported.go

@@ -4,8 +4,10 @@ package windows
 
 import "errors"
 
-type SMTCPlaybackState int
-type SMTCButton int
+type (
+	SMTCPlaybackState int
+	SMTCButton        int
+)
 
 const (
 	// constants from smtc.h in github.com/supersonic-app/smtc-dll

backend/windows/taskbar_buttons.go

@@ -10,6 +10,7 @@ package windows
 extern void goButtonClicked(int);
 */
 import "C"
+
 import (
 	"errors"
 	"image"