fix error cannot find module. (#886)

* ref: external library

* ref: rollup browser still need import file url

Author: binsarjr

rollup.config.browser.js

@@ -14,6 +14,7 @@ export default {
   // Specify here external modules which you don't want to include in your bundle (for instance: 'lodash', 'moment' etc.)
   // https://rollupjs.org/guide/en#external-e-external
   external: [
+    // brain js already uses gpu.js as peer dependencies so it shouldn't be like this
     fileURLToPath(
       new URL('./node_modules/gpu.js/src/index.js', import.meta.url)
     ),

rollup.config.js

@@ -3,7 +3,7 @@ import json from '@rollup/plugin-json';
 import resolve from '@rollup/plugin-node-resolve';
 import typescript from '@rollup/plugin-typescript';
 import * as pkg from './package.json';
-import { fileURLToPath } from 'node:url';
+// import { fileURLToPath } from 'node:url';
 
 const extensions = ['.js', '.json', '.node', '.ts'];
 
@@ -13,9 +13,13 @@ export default {
   // Specify here external modules which you don't want to include in your bundle (for instance: 'lodash', 'moment' etc.)
   // https://rollupjs.org/guide/en#external-e-external
   external: [
-    fileURLToPath(
-      new URL('./node_modules/gpu.js/src/index.js', import.meta.url)
-    ),
+    // brain js already uses gpu.js as peer dependencies so it shouldn't be like this
+    // fileURLToPath(
+    //   new URL('./node_modules/gpu.js/src/index.js', import.meta.url)
+    // ),
+    
+    // But this
+    'gpu.js'
   ],
 
   plugins: [