Update dependencies and improve build system

babel.config.js

@@ -0,0 +1,16 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        useBuiltIns: 'usage', // adds specific imports for polyfills when they are used in each file.
+        modules: false, // preserve ES modules.
+        corejs: { version: 3, proposals: true }, // enable polyfilling of every proposal supported by core-js.
+      },
+    ],
+  ],
+  plugins: [
+    '@babel/plugin-transform-runtime', // enables the re-use of Babel's injected helper code to save on codesize.
+  ],
+  exclude: [/core-js/],
+}