Upgrade webpack to v4.

fnando · fnando · commit ff6939a52f44 · 2018-04-02T12:14:18.000-03:00
diff --git a/package.json b/package.json
@@ -26,6 +26,7 @@
     "mocha": "5.0.5",
     "snap-shot": "2.17.0",
     "uglifyjs-webpack-plugin": "1.2.4",
-    "webpack": "3.8.1"
+    "webpack": "4.4.1",
+    "webpack-cli": "2.0.13"
   }
 }
diff --git a/webpack.config.js b/webpack.config.js
@@ -1,18 +1,22 @@
 const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
 let filename;
 let plugins = [];
+let mode;
 
 if (process.env.NODE_ENV === "production") {
+  mode = "production";
   filename = "sparkline.min.js";
   plugins.push(new UglifyJSPlugin({sourceMap: true}));
 } else {
+  mode = "development";
   filename = "sparkline.js";
 }
 
 module.exports = {
   entry: `${__dirname}/src/sparkline.js`,
   devtool: "source-map",
   target: "web",
+  mode: mode,
   node: {
     fs: "empty"
   },
diff --git a/yarn.lock b/yarn.lock
