npm and error messages

node_modules/cssnano/dist/lib/styleCache.js

@@ -0,0 +1,24 @@
+'use strict';
+
+exports.__esModule = true;
+
+var _postcss = require('postcss');
+
+exports.default = (0, _postcss.plugin)('cssnano-reset-stylecache', function () {
+    return function (css, result) {
+        result.root.rawCache = {
+            colon: ':',
+            indent: '',
+            beforeDecl: '',
+            beforeRule: '',
+            beforeOpen: '',
+            beforeClose: '',
+            beforeComment: '',
+            after: '',
+            emptyBody: '',
+            commentLeft: '',
+            commentRight: ''
+        };
+    };
+});
+module.exports = exports['default'];