Merge pull request #566 from textpattern/greenkeeper/sass-1.26.0

Update sass to the latest version 🚀

Author: philwareham

package.json

@@ -33,7 +33,7 @@
     "file-loader": "5.1.0",
     "mini-css-extract-plugin": "0.9.0",
     "postcss-loader": "3.0.0",
-    "sass": "1.24.4",
+    "sass": "1.26.0",
     "sass-loader": "8.0.0",
     "stylelint": "13.2.0",
     "stylelint-order": "3.1.1",