es5 experiments

.babelrc

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+{
+    "presets": [
+        [
+            "@babel/preset-env",
+            {
+                "corejs": 2,
+                "useBuiltIns": "usage",
+                "targets": {
+                    "ie": 11
+                }
+            }
+        ]
+    ]
+}

config/rollup.es5.config.js

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+import resolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import babel from 'rollup-plugin-babel'
+import { uglify } from 'rollup-plugin-uglify'
+import { minify } from 'uglify-es'
+
+export default {
+    input: './src/index.js',
+    output: {
+        file: 'es5/index.js',
+        format: 'umd',
+        name: 'hyperactiv',
+        sourcemap: true
+    },
+    plugins: [
+        resolve(),
+        commonjs(),
+        babel({
+            exclude: 'node_modules/**'
+        }),
+        uglify({}, minify)
+    ]
+}