fix: eslint v10 compat

Author: antfu

src/rules/no-ts-export-equal.ts

@@ -18,7 +18,7 @@ export default createEslintRule<Options, MessageIds>({
   },
   defaultOptions: [],
   create: (context) => {
-    const extension = context.getFilename().split('.').pop()
+    const extension = context.filename.split('.').pop()
     if (!extension)
       return {}
     if (!['ts', 'tsx', 'mts', 'cts'].includes(extension))