Rollup CJS changes

rollup.config.mjs

@@ -0,0 +1,25 @@
+import pkg from './package.json' assert { type: 'json' }
+import json from '@rollup/plugin-json'
+import commonjs from '@rollup/plugin-commonjs'
+
+export default {
+  input: 'src/ergogen.js',
+  external: ['makerjs', 'js-yaml', 'mathjs', 'kle-serial', 'jszip'],
+  output: {
+    name: 'ergogen',
+    file: 'dist/ergogen.js',
+    format: 'umd',
+    banner: `/*!\n * Ergogen v${pkg.version}\n * https://ergogen.xyz\n */\n`,
+    globals: {
+      'makerjs': 'makerjs',
+      'js-yaml': 'jsyaml',
+      'mathjs': 'math',
+      'kle-serial': 'kle',
+      'jszip': 'jszip'
+    }
+  },
+  plugins: [
+    json(),
+    commonjs()
+  ]
+}