Use SIGINT when killing runtime process

`kill()` uses `SIGTERM` by default. In `workerd`, this waits for HTTP
connections to close before exiting. Notably, Chrome sometimes keeps
connections open for about 10s, blocking exit. We'd like `dispose()`/
`setOptions()` to immediately terminate the existing process.
Therefore, use `SIGINT` which force closes all connections.

Ref: cloudflare/workerd#244

Author: mrbbot

packages/miniflare/src/runtime/index.ts

@@ -134,7 +134,13 @@ class NativeRuntime extends Runtime {
 	}
 
 	dispose(): Awaitable<void> {
-		this.#process?.kill();
+		// `kill()` uses `SIGTERM` by default. In `workerd`, this waits for HTTP
+		// connections to close before exiting. Notably, Chrome sometimes keeps
+		// connections open for about 10s, blocking exit. We'd like `dispose()`/
+		// `setOptions()` to immediately terminate the existing process.
+		// Therefore, use `SIGINT` which force closes all connections.
+		// See https://github.com/cloudflare/workerd/pull/244.
+		this.#process?.kill("SIGINT");
 		return this.#processExitPromise;
 	}
 }