fix: close compiler on SIGINT

Author: snitin315

packages/webpack-cli/lib/webpack-cli.js

@@ -2125,13 +2125,18 @@ class WebpackCLI {
       return;
     }
 
+    process.on("SIGINT", () => {
+      compiler.close();
+    });
+
     const isWatch = (compiler) =>
       compiler.compilers
         ? compiler.compilers.some((compiler) => compiler.options.watch)
         : compiler.options.watch;
 
     if (isWatch(compiler) && this.needWatchStdin(compiler)) {
       process.stdin.on("end", () => {
+        compiler.close();
         process.exit(0);
       });
       process.stdin.resume();