Capture signal exits more than once

[erictheswift]

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used patch-package to patch signal-exit@4.1.0 for the project I'm working on.

I saw version 4.1.0 to

Add the ability to capture signal exits by returning true from the onExit listener.

and decided to try.
I found that capturing signal by returning true actually works only once — after first capture signal-exit eats it successfully but gets unloaded.

Here is the diff that solved my problem:

diff --git a/node_modules/signal-exit/dist/mjs/index.js b/node_modules/signal-exit/dist/mjs/index.js
index 4a78bad..3a289aa 100644
--- a/node_modules/signal-exit/dist/mjs/index.js
+++ b/node_modules/signal-exit/dist/mjs/index.js
@@ -61,13 +61,14 @@ class Emitter {
         if (this.emitted[ev]) {
             return false;
         }
-        this.emitted[ev] = true;
         let ret = false;
         for (const fn of this.listeners[ev]) {
             ret = fn(code, signal) === true || ret;
         }
+        this.emitted[ev] = !ret;
         if (ev === 'exit') {
             ret = this.emit('afterExit', code, signal) || ret;
+            this.emitted['afterExit'] = !ret;
         }
         return ret;
     }
@@ -139,6 +140,7 @@ class SignalExit extends SignalExitBase {
                     const s = sig === 'SIGHUP' ? this.#hupSig : sig;
                     if (!ret)
                         process.kill(process.pid, s);
+                    else this.load()
                     /* c8 ignore stop */
                 }
             };

This issue body was partially generated by patch-package.