🔧 chore: fix build error

Author: guanghechen

tokenizers/ecma-import/src/util.ts

@@ -25,9 +25,9 @@ export const regex2 = new RegExp(
  * import { YozoraParser, YozoraParser as Parser } from '@yozora/parser'
  */
 export const regex3 = new RegExp(
-  /^import\s+(?:([\w]+)\s*,\s*)?/.source +
+  '^import\\s+(?:([\\w]+)\\s*,\\s*)?'+
     namedImportRegex.source +
-    /from\s+(['"])([^'"]+)\3/.source +
+    `from\\s+(['"])([^'"]+)\\3` +
     endRegex.source,
 )