style: fix formatting in build config

- Fix indentation in babel.config.js
- Use Set instead of Array for EXTERNAL_PACKAGES in rollup config

Author: jdalton

.config/babel.config.js

@@ -9,7 +9,7 @@ module.exports = {
         absoluteRuntime: false,
         corejs: false,
         helpers: true,
-regenerator: false,
+        regenerator: false,
         version: '^7.27.1',
       },
     ],

.config/rollup.base.config.mjs

@@ -6,7 +6,7 @@ import commonjsPlugin from '@rollup/plugin-commonjs'
 import jsonPlugin from '@rollup/plugin-json'
 import { nodeResolve } from '@rollup/plugin-node-resolve'
 
-const EXTERNAL_PACKAGES = ['@socketsecurity/registry']
+const EXTERNAL_PACKAGES = new Set(['@socketsecurity/registry'])
 
 function isBuiltin(id) {
   return (
@@ -65,7 +65,7 @@ export default function baseConfig(extendConfig = {}) {
         id.endsWith('.d.cts') ||
         id.endsWith('.d.mts') ||
         id.endsWith('.d.ts') ||
-        EXTERNAL_PACKAGES.includes(pkgName) ||
+        EXTERNAL_PACKAGES.has(pkgName) ||
         isBuiltin(rawId)
       )
     },