Bump version to 2.7.2

Author: gilbertchen

duplicacy/duplicacy_main.go

@@ -2186,7 +2186,7 @@ func main() {
 	app.Name = "duplicacy"
 	app.HelpName = "duplicacy"
 	app.Usage = "A new generation cloud backup tool based on lock-free deduplication"
-	app.Version = "2.7.1" + " (" + GitCommit + ")"
+	app.Version = "2.7.2" + " (" + GitCommit + ")"
 
 	// If the program is interrupted, call the RunAtError function.
 	c := make(chan os.Signal, 1)