Update dev dependencies

Author: philwareham

package.json

@@ -2,7 +2,7 @@
   "name": "textpattern-default-theme",
   "title": "Default theme",
   "txp-type": "textpattern-theme",
-  "version": "4.8.7",
+  "version": "4.8.8",
   "description": "The default theme that ships as standard with Textpattern CMS.",
   "author": "Team Textpattern",
   "homepage": "https://github.com/textpattern/textpattern-default-theme",
@@ -25,22 +25,22 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "10.2.6",
-    "clean-webpack-plugin": "3.0.0",
-    "copy-webpack-plugin": "9.0.0",
+    "autoprefixer": "10.3.7",
+    "clean-webpack-plugin": "4.0.0",
+    "copy-webpack-plugin": "9.0.1",
     "cross-env": "7.0.3",
-    "css-loader": "5.2.6",
-    "mini-css-extract-plugin": "1.6.0",
-    "postcss": "8.3.0",
-    "postcss-loader": "5.3.0",
-    "sass": "1.32.8",
-    "sass-loader": "11.1.1",
+    "css-loader": "6.3.0",
+    "mini-css-extract-plugin": "2.4.2",
+    "postcss": "8.3.9",
+    "postcss-loader": "6.1.1",
+    "sass": "1.42.1",
+    "sass-loader": "12.1.0",
     "stylelint": "13.13.1",
     "stylelint-order": "4.1.0",
-    "stylelint-scss": "3.19.0",
-    "stylelint-webpack-plugin": "2.1.1",
-    "webpack": "5.38.1",
-    "webpack-cli": "4.7.0",
+    "stylelint-scss": "3.21.0",
+    "stylelint-webpack-plugin": "3.0.1",
+    "webpack": "5.58.0",
+    "webpack-cli": "4.9.0",
     "webpack-manifest-version-sync-plugin": "0.0.4"
   },
   "browserslist": [