Encore.configureUrlLoader() - Replace some 'let' by 'const'

Author: Lyrkan

lib/config-generator.js

@@ -153,7 +153,7 @@ class ConfigGenerator {
             // The url-loader can be used instead of the default file-loader by
             // calling Encore.configureUrlLoader({ images: {/* ... */}})
             let loaderName = 'file-loader';
-            let loaderOptions = {
+            const loaderOptions = {
                 name: filename,
                 publicPath: this.webpackConfig.getRealPublicPath()
             };
@@ -181,7 +181,7 @@ class ConfigGenerator {
             // The url-loader can be used instead of the default file-loader by
             // calling Encore.configureUrlLoader({ fonts: {/* ... */}})
             let loaderName = 'file-loader';
-            let loaderOptions = {
+            const loaderOptions = {
                 name: filename,
                 publicPath: this.webpackConfig.getRealPublicPath()
             };