refactor: use pnpm as management tool then fix install&compile error

pinry-spa/package.json

@@ -10,6 +10,7 @@
   "dependencies": {
     "axios": "^0.21.2",
     "buefy": "^0.8.20",
+    "bulma": "0.7.5",
     "core-js": "^3.3.2",
     "register-service-worker": "^1.6.2",
     "vue": "^2.6.10",