Replace exit-hook with custom event listeners

Instead of relying on the `exit-hook` dependency, we should listen to
`exit`, `SIGINT`, `SIGTERM` and other exceptions, and kill all running
processes.

package-lock.json

@@ -48,7 +48,6 @@
         "eslint-plugin-no-only-tests": "^3.1.0",
         "eslint-plugin-svelte": "^2.35.0",
         "execa": "^8.0.1",
-        "exit-hook": "^4.0.0",
         "get-port": "^7.0.0",
         "happy-dom": "^12.10.3",
         "prettier": "^3.1.0",
@@ -2326,18 +2325,6 @@
         "url": "https://github.com/sindresorhus/execa?sponsor=1"
       }
     },
-    "node_modules/exit-hook": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/exit-hook/-/exit-hook-4.0.0.tgz",
-      "integrity": "sha512-Fqs7ChZm72y40wKjOFXBKg7nJZvQJmewP5/7LtePDdnah/+FH9Hp5sgMujSCMPXlxOAW2//1jrW9pnsY7o20vQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=18"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/extend-shallow": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",

package.json

@@ -38,7 +38,6 @@
     "eslint-plugin-no-only-tests": "^3.1.0",
     "eslint-plugin-svelte": "^2.35.0",
     "execa": "^8.0.1",
-    "exit-hook": "^4.0.0",
     "get-port": "^7.0.0",
     "happy-dom": "^12.10.3",
     "prettier": "^3.1.0",

tests/support/process.ts

@@ -1,7 +1,6 @@
 import type { ExecaChildProcess, Options } from "execa";
 
 import * as Stream from "node:stream";
-import onExit from "exit-hook";
 import { StringDecoder } from "string_decoder";
 import { execa } from "execa";
 
@@ -11,7 +10,9 @@ import { logPrefix } from "./logPrefix.js";
 // We add all proxy and node instances that we spawn to this list.
 const processes: ExecaChildProcess[] = [];
 
-onExit(killAllProcesses);
+process.on("exit", killAllProcesses);
+process.on("SIGINT", killAllProcesses);
+process.on("SIGTERM", killAllProcesses);
 
 // Kill all processes with SIGKILL
 export function killAllProcesses(): void {
@@ -20,6 +21,7 @@ export function killAllProcesses(): void {
       process.kill("SIGKILL");
     }
   }
+  process.exit();
 }
 
 // Spawn a process with `execa` and register it.