chore: update @vue/component-compiler-utils to v3

It's a rather small change that does not affect vue-loader.
Updated to accommodate future bug fixes.

package.json

@@ -37,7 +37,7 @@
     "webpack": "^4.1.0 || ^5.0.0-0"
   },
   "dependencies": {
-    "@vue/component-compiler-utils": "^2.5.1",
+    "@vue/component-compiler-utils": "^3.0.0",
     "hash-sum": "^1.0.2",
     "loader-utils": "^1.1.0",
     "vue-hot-reload-api": "^2.3.0",