Add ts-check to webpack.config.js

Author: styfle

package.json

@@ -23,6 +23,7 @@
     "@types/react": "^16.4.7",
     "@types/react-dom": "^16.0.6",
     "@types/tape": "^4.2.32",
+    "@types/webpack": "^4.4.10",
     "prettier": "1.14.0",
     "source-map-loader": "^0.2.3",
     "tape": "^4.9.1",

webpack.config.js

@@ -1,6 +1,10 @@
+//@ts-check
+/** @typedef {import('webpack').Configuration} WebpackConfig **/
 const nodeExternals = require('webpack-node-externals');
 
-module.exports = [
+
+/** @type WebpackConfig[] */
+const configs = [
     {
         entry: {
             browser: './src/browser.tsx',
@@ -60,3 +64,5 @@ module.exports = [
         externals: [nodeExternals()],
     },
 ];
+
+module.exports = configs;