chore: Pin vscode-vue-languageservice to 0.27.26 (#473)

Author: wlee221

package.json

@@ -33,7 +33,8 @@
     "ws": "^7.4.6",
     "jest": "^26.6.3",
     "ts-jest": "^26.5.6",
-    "prismjs": "^1.25.0"
+    "prismjs": "^1.25.0",
+    "vscode-vue-languageservice": "0.27.26"
   },
   "dependencies": {
     "patch-package": "^6.4.7",