Fix unhandled cancellation exception

Author: cknitt

src/Main.res

@@ -10,7 +10,6 @@ let getVersion = async () => {
 
 let handleError = async (~outro, perform) =>
  try await perform() catch {
- | P.Canceled => P.cancel("Canceled.")
  | Exn.Error(error) =>
  switch error->Exn.message {
  | Some(message) => P.Log.error("Error: " ++ message)
@@ -58,4 +57,6 @@ https://www.rescript-lang.org`,
  }
 }
 
-await run()
+try await run() catch {
+| P.Canceled => P.cancel("Canceled.")
+}