feat: consider whether exist node.templateBody

Author: tyankatsu0105

lib/rules/no-empty-component-block.js

@@ -49,6 +49,10 @@ module.exports = {
   create(context) {
     return {
       Program(node) {
+        if (!node.templateBody) {
+          return
+        }
+
         const componentBlocks = node.templateBody.parent.children
 
         for (const componentBlock of componentBlocks) {