chore: fix typo

Author: antfu

src/core/transformSfcRefSugar.ts

@@ -1,7 +1,7 @@
 import { shouldTransform, transformAST } from '@vue/ref-transform'
 import MagicString from 'magic-string'
-import babelParser from '@babel/parser'
-import babelCore from '@babel/core'
+import * as babelParser from '@babel/parser'
+import * as babelCore from '@babel/core'
 import type { ParsedSFC, ResolvedOptions } from '../types'
 
 const { types: t } = babelCore