fix: npx usage (#3400)

Author: alexander-akait

bin/webpack-dev-server.js

@@ -36,13 +36,29 @@ const runCommand = (command, args) => {
  * @returns {boolean} is the package installed?
  */
 const isInstalled = (packageName) => {
-  try {
-    require.resolve(packageName);
-
+  if (process.versions.pnp) {
     return true;
-  } catch (err) {
-    return false;
   }
+
+  const path = require('path');
+  const fs = require('graceful-fs');
+
+  let dir = __dirname;
+
+  do {
+    try {
+      if (
+        fs.statSync(path.join(dir, 'node_modules', packageName)).isDirectory()
+      ) {
+        return true;
+      }
+    } catch (_error) {
+      // Nothing
+    }
+    // eslint-disable-next-line no-cond-assign
+  } while (dir !== (dir = path.dirname(dir)));
+
+  return false;
 };
 
 /**