Force cleanup on stdin/out/err on exit

Author: pimterry

src/index.ts

@@ -154,6 +154,10 @@ if (!amMainInstance) {
                 console.log('Failed to kill server', error);
                 logError(error);
             } finally {
+                if (process.stdin) process.stdin.destroy();
+                if (process.stdout) process.stdout.destroy();
+                if (process.stderr) process.stderr.destroy();
+
                 // We've done our best - now shut down for real.
                 app.quit();
             }