chore: use experimentalExposeScriptSetupContext for vue-tsc

This new option allows a better typechecking of components that expose variables.
See vuejs/language-tools#805

Refs vuejs#972 as this partially fixes it

tests/expose.spec.ts

@@ -28,7 +28,7 @@ describe('expose', () => {
     expect(wrapper.vm.other).toBe('other')
     // can't access `msg` as it is not exposed
     // and we are in a component with a setup returning a render function
-    expect(wrapper.vm.msg).toBeUndefined()
+    expect((wrapper.vm as unknown as { msg: undefined }).msg).toBeUndefined()
   })
 
   it('access vm with <script setup> and defineExpose()', async () => {

tsconfig.json

@@ -22,5 +22,8 @@
     "tests",
     "src",
     "types"
-  ]
+  ],
+  "vueCompilerOptions": {
+    "experimentalExposeScriptSetupContext": true
+  }
 }

tsconfig.volar.json

@@ -3,6 +3,5 @@
   "compilerOptions": {
     "lib": ["DOM", "ES2020"],
     "skipLibCheck": true
-  },
-  "exclude": ["tests/expose.spec.ts"]
+  }
 }