Use TypeScript in Webpack config

.postcssrc.json

@@ -0,0 +1,9 @@
+{
+"plugins": {
+	"postcss-import": {},
+	"postcss-preset-env": {
+		"browsers": "last 2 versions"
+	},
+	"cssnano": {}
+}
+}

package.json

@@ -16,13 +16,22 @@
     "poland"
   ],
   "author": "Michał Górny",
+  "dependencies": {
+    "chartist": "^0.11.4",
+    "modern-normalize": "^0.5.0"
+  },
   "devDependencies": {
     "@babel/core": "^7.12.3",
     "@babel/preset-env": "^7.12.1",
     "@babel/preset-typescript": "^7.12.1",
     "@babel/register": "^7.12.1",
     "@types/chartist": "^0.9.46",
+    "@types/html-webpack-plugin": "^3.2.5",
+    "@types/mini-css-extract-plugin": "^1.4.3",
     "@types/pug": "^2.0.4",
+    "@types/webpack": "^4.41.29",
+    "@types/webpack-dev-server": "^3.11.4",
+    "@types/webpack-livereload-plugin": "^2.3.2",
     "@typescript-eslint/eslint-plugin": "^4.6.1",
     "@typescript-eslint/parser": "^4.6.1",
     "babel-loader": "^8.1.0",
@@ -31,11 +40,11 @@
     "eslint": "^7.11.0",
     "eslint-config-airbnb-base": "^14.2.0",
     "eslint-plugin-import": "^2.22.1",
-    "eslint-webpack-plugin": "^2.1.0",
+    "eslint-webpack-plugin": "^2.5.4",
     "gh-pages": "^2.1.1",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^1.2.1",
-    "postcss": "^8.2.10",
+    "postcss": "^8.2.15",
     "postcss-import": "^12.0.1",
     "postcss-loader": "^4.0.4",
     "postcss-preset-env": "^6.7.0",
@@ -49,9 +58,5 @@
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0",
     "webpack-livereload-plugin": "^2.3.0"
-  },
-  "dependencies": {
-    "chartist": "^0.11.4",
-    "modern-normalize": "^0.5.0"
   }
 }

postcss.config.js

@@ -1,9 +0,0 @@
-module.exports = {
-	plugins: {
-		'postcss-import': {},
-		'postcss-preset-env': {
-			browsers: 'last 2 versions',
-		},
-		cssnano: {},
-	},
-};

tsconfig.json

@@ -1,12 +1,12 @@
 {
 	"compilerOptions": {
 		"allowSyntheticDefaultImports": true,
-		"module": "es6",
+		"esModuleInterop": true,
 		"moduleResolution": "node",
 		"outDir": "./dist/",
 		"removeComments": true,
 		"sourceMap": true,
 		"strict": true,
-		"target": "es5"
+		"target": "ES5"
 	}
 }