chore(dependencies): update postcss

Author: renovate[bot]

Diff for: package-lock.json

@@ -52,22 +52,22 @@
     "babel-loader": "8.2.4",
     "chromatic": "6.5.3",
     "core-js": "3.21.1",
-    "cssnano": "5.1.5",
-    "cssnano-preset-advanced": "5.3.1",
+    "cssnano": "6.0.1",
+    "cssnano-preset-advanced": "6.0.1",
     "filewatcher-webpack-plugin": "1.2.0",
     "globby": "12.2.0",
     "husky": "7.0.4",
     "lerna": "4.0.0",
     "lit-html": "2.2.1",
     "postcss": "8.4.12",
-    "postcss-cli": "9.1.0",
-    "postcss-custom-properties": "12.1.5",
+    "postcss-cli": "10.1.0",
+    "postcss-custom-properties": "13.3.2",
     "postcss-host": "2.0.1",
-    "postcss-import": "14.1.0",
+    "postcss-import": "15.1.0",
     "postcss-import-url": "7.0.0",
     "postcss-mixins": "9.0.2",
-    "postcss-modules": "4.3.1",
-    "postcss-nested": "5.0.6",
+    "postcss-modules": "6.0.0",
+    "postcss-nested": "6.0.1",
     "postcss-url": "10.1.3",
     "tailwindcss": "3.0.23",
     "typescript": "4.6.2",