add some packages

node_modules/clean-css/lib/optimizer/level-1/tidy-block.js

@@ -0,0 +1,23 @@
+var SUPPORTED_COMPACT_BLOCK_MATCHER = /^@media\W/;
+
+function tidyBlock(values, spaceAfterClosingBrace) {
+  var withoutSpaceAfterClosingBrace;
+  var i;
+
+  for (i = values.length - 1; i >= 0; i--) {
+    withoutSpaceAfterClosingBrace = !spaceAfterClosingBrace && SUPPORTED_COMPACT_BLOCK_MATCHER.test(values[i][1]);
+
+    values[i][1] = values[i][1]
+      .replace(/\n|\r\n/g, ' ')
+      .replace(/\s+/g, ' ')
+      .replace(/(,|:|\() /g, '$1')
+      .replace(/ \)/g, ')')
+      .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
+      .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1')
+      .replace(withoutSpaceAfterClosingBrace ? /\) /g : null, ')');
+  }
+
+  return values;
+}
+
+module.exports = tidyBlock;