bumped go version to 1.25.0

ran 'go fix' again. this replaces the waitgroup.Add()/Done() idiom with
new waitgoup.Go()

edited statviz patch file so that it can still be applied

Author: JetSetIlly

0001-statsviz.patch

@@ -3,7 +3,7 @@ index 94421d750..cc8a72055 100644
 --- a/go.mod
 +++ b/go.mod
 @@ -3,6 +3,7 @@ module github.com/jetsetilly/gopher2600
- go 1.24.0
+ go 1.25.0
 
  require (
 +	github.com/arl/statsviz v0.6.0

go.mod

@@ -1,6 +1,6 @@
 module github.com/jetsetilly/gopher2600
 
-go 1.24.0
+go 1.25.0
 
 require (
 	github.com/go-audio/audio v1.0.0

gui/sdlaudio/audio.go

@@ -173,11 +173,9 @@ func (aud *Audio) SetSpec(spec specification.Spec) {
 	}
 
 	// start new request
-	aud.updateSync.Add(1)
 
-	go func() {
+	aud.updateSync.Go(func() {
 		// request always signals when it's done
-		defer aud.updateSync.Done()
 
 		// wait for cancel request or a timeout
 		select {
@@ -188,7 +186,7 @@ func (aud *Audio) SetSpec(spec specification.Spec) {
 			// audio goroutine
 			aud.updateCommit <- spec
 		}
-	}()
+	})
 }
 
 func (aud *Audio) setSpec(spec specification.Spec) {

regression/regression.go

@@ -446,11 +446,9 @@ func RegressRun(messages io.Writer, opts RegressRunOptions) error {
 			return nil
 		}
 
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
+		wg.Go(func() {
 			runTest(reg, key)
-		}()
+		})
 
 		return nil
 	}