chore: added iife bundling to rollup config

package.json

@@ -7,6 +7,7 @@
     "main": "lib/keycert.js",
     "module": "lib/keycert.m.js",
     "types": "lib/keycert.d.ts",
+    "iife": "lib/keycert.iife.js",
     "browser": {
         "buffer": false,
         "crypto": false
@@ -27,6 +28,9 @@
         "tslib": "^2.1.0"
     },
     "devDependencies": {
+        "@rollup/plugin-commonjs": "^25.0.7",
+        "@rollup/plugin-json": "^6.1.0",
+        "@rollup/plugin-node-resolve": "^15.2.3",
         "@rollup/plugin-typescript": "^8.1.1",
         "@types/mocha": "^9.0.0",
         "@types/node": "^16.4.13",
@@ -40,8 +44,9 @@
         "mocha": "^9.0.3",
         "nyc": "^15.1.0",
         "prettier": "^2.2.1",
-        "rollup": "^2.38.2",
+        "rollup": "^2.78.0",
         "rollup-plugin-dts": "^4.0.0",
+        "rollup-plugin-terser": "^7.0.2",
         "ts-node": "^10.2.0",
         "typedoc": "^0.22.4",
         "typescript": "^4.1.2"

rollup.config.js

@@ -1,6 +1,10 @@
 import fs from 'fs'
 import dts from 'rollup-plugin-dts'
 import typescript from '@rollup/plugin-typescript'
+import resolve from '@rollup/plugin-node-resolve'
+import commonjs from '@rollup/plugin-commonjs'
+import json from '@rollup/plugin-json';
+import { terser } from 'rollup-plugin-terser';
 
 import pkg from './package.json'
 
@@ -43,6 +47,26 @@ export default [
         external,
         onwarn,
     },
+    {
+        input: 'src/index.ts',
+        output: {
+            banner,
+            name: 'KeycertJs',
+            file: pkg.iife,
+            format: 'iife',
+            globals: {},
+            sourcemap: true,
+        },
+        plugins: [
+            json(),
+            typescript({ tsconfig: './tsconfig.json' }),
+            resolve(), 
+            commonjs(),
+            terser(),
+        ],
+        external: [], // All dependencies are bundled
+        onwarn,
+    },
     {
         input: 'src/index.ts',
         output: {banner, file: pkg.types, format: 'esm'},