breaking: Extend babel config from @patternslib/dev.

Author: thet

babel.config.js

@@ -1,34 +1 @@
-module.exports = (env) => {
-    let config = {
-        presets: [
-            [
-                "@babel/preset-env",
-                {
-                    useBuiltIns: "entry",
-                    corejs: 3,
-                },
-            ],
-        ],
-    };
-
-    // passed via NODE_ENV=development environment variable.
-    if (env.env() === "development") {
-        // For development, do less transformations for better readability.
-        config = {
-            presets: [
-                [
-                    "@babel/preset-env",
-                    {
-                        modules: false,
-                        debug: true,
-                        useBuiltIns: false,
-                        targets: "last 1 Chrome version, last 1 Firefox version",
-                    },
-                ],
-            ],
-            plugins: ["@babel/plugin-proposal-optional-chaining"],
-        };
-    }
-
-    return config;
-};
+module.exports = require("@patternslib/dev/babel.config.js");