Update libraries

package.json

@@ -7,7 +7,7 @@
     "url": "https://github.com/drastus/sejm-calculator.git"
   },
   "scripts": {
-    "start": "webpack-dev-server --inline --watch --hot",
+    "start": "webpack-dev-server --mode=development --hot",
     "build": "webpack --mode=production",
     "deploy": "gh-pages -d dist"
   },
@@ -36,7 +36,7 @@
     "@typescript-eslint/parser": "^4.6.1",
     "babel-loader": "^8.1.0",
     "css-loader": "^3.2.0",
-    "cssnano": "^4.1.10",
+    "cssnano": "^5.1.6",
     "eslint": "^7.11.0",
     "eslint-config-airbnb-base": "^14.2.0",
     "eslint-plugin-import": "^2.22.1",
@@ -55,8 +55,8 @@
     "stylelint-webpack-plugin": "^2.1.1",
     "typescript": "^4.0.5",
     "webpack": "^4.44.2",
-    "webpack-cli": "^3.3.12",
-    "webpack-dev-server": "^3.11.0",
+    "webpack-cli": "^4.9.2",
+    "webpack-dev-server": "^4.9.0",
     "webpack-livereload-plugin": "^2.3.0"
   }
 }

webpack.config.ts

@@ -1,3 +1,4 @@
+/* eslint-disable import/no-extraneous-dependencies */
 import path from 'path';
 import ESLintPlugin from 'eslint-webpack-plugin';
 import HtmlWebpackPlugin from 'html-webpack-plugin';