fix: replace find with filter

Fixing find, should be filter

src/factories/createCompilerCallback.js

@@ -50,7 +50,7 @@ export default (compiler: Compiler, callback: Function): Function => {
 
     debug('requestMap', requestMap);
 
-    const files = stats.compilation.chunks[0].files.find((file) => {
+    const files = stats.compilation.chunks[0].files.filter((file) => {
       return /\.js$/.test(file);
     });
     const bundleName = files[files.length - 1];