refactor(webpack): rename argument of exported function

{{ cookiecutter.project_slug }}/webpack/webpack.config.js

@@ -54,9 +54,9 @@
 
 //------------------------------------------------------------------------------
 
-module.exports = function (_, webpackEnv) {
-  const isDevelopment = webpackEnv.mode === "development";
-  const isProduction = webpackEnv.mode === "production";
+module.exports = function (_, argv) {
+  const isDevelopment = argv.mode === "development";
+  const isProduction = argv.mode === "production";
   const port = process.env.PORT || 8080;
 
   const getStyleLoaders = () => [
@@ -206,7 +206,7 @@
       isDevelopment && new CheckPortPlugin(port),
       isProduction && new BuildFolderWiper(buildDir),
       new webpack.DefinePlugin({
-        "process.env.NODE_ENV": JSON.stringify(webpackEnv.mode),
+        "process.env.NODE_ENV": JSON.stringify(argv.mode),
       }),
       new webpack.EnvironmentPlugin([
         // Pass all public env variables here