update node modules

node_modules/clean-css/lib/optimizer/level-1/property-optimizers/font-weight.js

@@ -0,0 +1,23 @@
+var OptimizationLevel = require('../../../options/optimization-level').OptimizationLevel;
+
+var plugin = {
+  level1: {
+    property: function fontWeight(_rule, property, options) {
+      var value = property.value[0][1];
+
+      if (!options.level[OptimizationLevel.One].optimizeFontWeight) {
+        return;
+      }
+
+      if (value == 'normal') {
+        value = '400';
+      } else if (value == 'bold') {
+        value = '700';
+      }
+
+      property.value[0][1] = value;
+    }
+  }
+};
+
+module.exports = plugin;