Update package.json

Author: philwareham

package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "@lodder/grunt-postcss": "3.1.1",
     "autoprefixer": "10.4.0",
-    "cssnano": "5.0.10",
+    "cssnano": "5.0.12",
     "grunt": "1.4.1",
     "grunt-cli": "1.4.3",
     "grunt-concurrent": "3.0.0",
@@ -40,8 +40,8 @@
     "grunt-sass": "3.1.0",
     "grunt-stylelint": "0.16.0",
     "load-grunt-tasks": "5.1.0",
-    "postcss": "8.3.11",
-    "sass": "1.43.4",
+    "postcss": "8.4.5",
+    "sass": "1.45.0",
     "stylelint": "13.13.1",
     "stylelint-order": "4.1.0",
     "stylelint-scss": "3.21.0",