fix: umd.min.js globals.hljs

Author: Daizhen1995

build/rollup.config.prod.js

@@ -10,7 +10,14 @@ const esOutputPath = path.resolve(__dirname, '../dist/vue3-highlight-es.min.js')
 export default {
   input: inputPath,
   output: [
-    { file: umdOutputPath, format: 'umd', name: 'Vue3Highlightjs' },
+    {
+      file: umdOutputPath,
+      format: 'umd',
+      name: 'Vue3Highlightjs',
+      globals: {
+        hljs: 'hljs',
+      },
+    },
     { file: cjsOutputPath, format: 'cjs' },
     { file: esOutputPath, format: 'es' },
   ],