Fix.

node_modules/cssstyle/lib/properties/backgroundAttachment.js

@@ -1,24 +0,0 @@
-'use strict';
-
-var parsers = require('../parsers');
-
-var isValid = (module.exports.isValid = function isValid(v) {
-  return (
-    parsers.valueType(v) === parsers.TYPES.KEYWORD &&
-    (v.toLowerCase() === 'scroll' || v.toLowerCase() === 'fixed' || v.toLowerCase() === 'inherit')
-  );
-});
-
-module.exports.definition = {
-  set: function(v) {
-    if (!isValid(v)) {
-      return;
-    }
-    this._setProperty('background-attachment', v);
-  },
-  get: function() {
-    return this.getPropertyValue('background-attachment');
-  },
-  enumerable: true,
-  configurable: true,
-};