fix: TypeScript definition file location

[Molunerfinn]

The old index.d.ts no longer exists.

[tencent-adm]

All committers have signed the CLA.

[chatoo2412]

workaround:

// typings/vconsole/index.d.ts

import 'vconsole/dist/vconsole.min.d';

// tsconfig.json

{
  // ...
  "compilerOptions": {
    // ...
    "typeRoots": ["./typings", "./node_modules/@types"]
  },
}