build: update tsconfig.json

Add `"skipLibCheck": true` to temporarily fix a build problem,
seeing: vuejs/core#6554.
When newer Vue released, drop it.

tsconfig.json

@@ -9,7 +9,8 @@
     "sourceMap": true,
     "resolveJsonModule": true,
     "esModuleInterop": true,
-    "lib": ["esnext", "dom"]
+    "lib": ["esnext", "dom"],
+    "skipLibCheck": true  // TODO https://github.com/vuejs/core/issues/6554 等待新版发布后更新vue版本并去除该选项
   },
   "include": ["src/**/*.ts", "src/**/*.d.ts", "src/**/*.tsx", "src/**/*.vue"]
 }