update node modules

node_modules/clean-css/lib/optimizer/level-1/value-optimizers/text-quotes.js

@@ -0,0 +1,25 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var LOCAL_PREFIX_PATTERN = /^local\(/i;
+var QUOTED_PATTERN = /^('.*'|".*")$/;
+var QUOTED_BUT_SAFE_PATTERN = /^['"][a-zA-Z][a-zA-Z\d\-_]+['"]$/;
+
+var plugin = {
+  level1: {
+    value: function textQuotes(_name, value, options) {
+      if (!options.level[OptimizationLevel.One].removeQuotes) {
+        return value;
+      }
+
+      if (!QUOTED_PATTERN.test(value) && !LOCAL_PREFIX_PATTERN.test(value)) {
+        return value;
+      }
+
+      return QUOTED_BUT_SAFE_PATTERN.test(value) ?
+        value.substring(1, value.length - 1) :
+        value;
+    }
+  }
+};
+
+module.exports = plugin;