Better error handling for vue-docgen-web-types

I couldn't find any option to get more verbose error messages if something goes wrong during generation, I just get this:
```
Building web-types to C:\dev\module-laravel-app\web-types.json
Error building web-types: Error building file C:\dev\module-laravel-app\web-types.json: Unexpected token (312:75)
```
which is really not helpful at all 😄
One of my vue files is throwing it off, I know as much, but there are plenty and manually trying them one by one would be arduous to say the least.