Update some dependencies

package.json

@@ -34,19 +34,19 @@
     "gh-pages": "^2.1.1",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^0.8.0",
-    "postcss": "^7.0.17",
+    "postcss": "^7.0.34",
     "postcss-import": "^12.0.1",
-    "postcss-loader": "^3.0.0",
+    "postcss-loader": "^4.0.4",
     "postcss-preset-env": "^6.7.0",
     "pug": "^2.0.4",
     "pug-loader": "^2.4.0",
-    "stylelint": "^10.1.0",
-    "stylelint-config-standard": "^18.3.0",
-    "stylelint-webpack-plugin": "^0.10.5",
+    "stylelint": "^13.7.2",
+    "stylelint-config-standard": "^20.0.0",
+    "stylelint-webpack-plugin": "^2.1.1",
     "typescript": "^3.5.3",
-    "webpack": "^4.39.1",
-    "webpack-cli": "^3.3.6",
-    "webpack-dev-server": "^3.8.0",
+    "webpack": "^4.44.2",
+    "webpack-cli": "^3.3.12",
+    "webpack-dev-server": "^3.11.0",
     "webpack-livereload-plugin": "^2.2.0"
   },
   "dependencies": {

webpack.config.babel.js

@@ -39,11 +39,6 @@ export default {
 					},
 					{
 						loader: 'postcss-loader',
-						options: {
-							config: {
-								path: __dirname + '/postcss.config.js',
-							},
-						},
 					},
 				],
 			},
@@ -64,8 +59,6 @@ export default {
 			configFile: path.resolve(__dirname, '.stylelintrc.json'),
 			context: path.resolve(__dirname, './src'),
 			files: '**/*.css',
-			failOnError: false,
-			quiet: false,
 		}),
 		new LiveReloadPlugin({
 			appendScriptTag: true,