v32.0.0 package and webpack updates, node 12 -> 14

package.json

@@ -10,6 +10,10 @@
     "ckeditor5-plugin",
     "ckeditor5-math"
   ],
+  "resolutions": {
+    "postcss-loader": "^4.0.0",
+    "mini-css-extract-plugin": "2.4.2"
+  },
   "dependencies": {
     "@ckeditor/ckeditor5-clipboard": "^32.0.0",
     "@ckeditor/ckeditor5-core": "^32.0.0",
@@ -34,16 +38,16 @@
     "html-webpack-plugin": "^5.3.1",
     "husky": "^4.2.5",
     "lint-staged": "^10.2.6",
-    "mini-css-extract-plugin": "^1.6.0",
+    "mini-css-extract-plugin": "^2.4.2",
     "raw-loader": "^4.0.2",
     "stylelint": "^13.5.0",
     "stylelint-config-ckeditor5": "^2.0.1",
-    "webpack": "^5.36.2",
+    "webpack": "^5.58.1",
     "webpack-cli": "^4.6.0",
     "webpack-dev-server": "^3.11.2"
   },
   "engines": {
-    "node": ">=12.0.0",
+    "node": ">=14.0.0",
     "npm": ">=5.7.1"
   },
   "author": "Sauli Anto",

webpack.config.js

@@ -44,14 +44,16 @@ module.exports = {
 					"css-loader",
 					{
 						loader: "postcss-loader",
-						options: styles.getPostCssConfig({
-							themeImporter: {
-								themePath: require.resolve(
-									"@ckeditor/ckeditor5-theme-lark"
-								),
-							},
-							minify: true,
-						}),
+						options: {
+							postcssOptions: styles.getPostCssConfig({
+								themeImporter: {
+									themePath: require.resolve(
+										"@ckeditor/ckeditor5-theme-lark"
+									),
+								},
+								minify: true,
+							}),
+						},
 					},
 				],
 			},