fix: use "api.isRecorded" instead of "module.hot.data" (#1569)

Author: liximomo

Diff for: lib/codegen/hotReload.js

@@ -19,7 +19,7 @@ if (module.hot) {
   api.install(require('vue'))
   if (api.compatible) {
     module.hot.accept()
-    if (!module.hot.data) {
+    if (!api.isRecorded('${id}')) {
       api.createRecord('${id}', component.options)
     } else {
       api.${functional ? 'rerender' : 'reload'}('${id}', component.options)