Support for older browsers

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@smartbear/browser-info",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Tiny developer-friendly JS library that provides information about host browser",
   "main": "dist/smartbear-browser-info.min.js",
   "scripts": {
@@ -33,18 +33,13 @@
   "devDependencies": {
     "@babel/core": "^7.11.6",
     "@babel/preset-env": "^7.11.5",
-    "corejs": "^1.0.0",
+    "@rollup/plugin-babel": "^5.2.1",
+    "@rollup/plugin-commonjs": "^15.1.0",
+    "@rollup/plugin-node-resolve": "^9.0.0",
+    "core-js": "^3.6.5",
     "eslint": "^7.8.1",
     "rollup": "^2.26.11",
-    "rollup-plugin-babel": "^4.4.0",
-    "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-delete": "^2.0.0",
-    "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-terser": "^7.0.2"
-  },
-  "browserslist": [
-    "> 4%",
-    "Firefox ESR",
-    "not dead"
-  ]
+  }
 }

rollup.config.js

@@ -1,6 +1,8 @@
 'use strict';
 
-import babel from 'rollup-plugin-babel';
+import cjs from '@rollup/plugin-commonjs';
+import resolve from '@rollup/plugin-node-resolve';
+import babel from '@rollup/plugin-babel';
 import { terser } from 'rollup-plugin-terser';
 import del from 'rollup-plugin-delete';
 
@@ -37,12 +39,14 @@ function getBabelPlugin() {
       [
         '@babel/env',
         {
-          useBuiltIns: 'entry',
-          corejs: '3.6',
+          targets: '> 2%, Firefox ESR, ie 11, safari 10, ios_saf 10',
+          useBuiltIns: 'usage',
+          corejs: 3,
           modules: false
         }
       ]
-    ]
+    ],
+    babelHelpers: 'bundled'
   });
 }
 
@@ -71,6 +75,8 @@ export default [
         targets: 'dist/*',
         runOnce: true
       }),
+      cjs(),
+      resolve(),
       getBabelPlugin()
     ],
     external
@@ -81,6 +87,8 @@ export default [
     input,
     output: getOutput(true),
     plugins: [
+      cjs(),
+      resolve(),
       getBabelPlugin(),
       terser({
         output: {
@@ -102,6 +110,8 @@ export default [
     input: 'src/embed.js',
     output: getOutput(true, '.embed'),
     plugins: [
+      cjs(),
+      resolve(),
       getBabelPlugin(),
       getTerserPlugin()
     ],