Cannot use `aldeed:schema-index`, getting error "index" is not a supported property

I'm having this issue with `aldeed:schema-index` although I think the same issue would apply also to other meteor packages. Basically what this package does is add several options to SimpleSchema.
```
SimpleSchema.extendOptions([
'index', // one of Number, String, Boolean
'unique', // Boolean
'sparse', // Boolean
]);
```

The problem is that I'm getting the following error:
```
Error: Invalid definition for username field: "index" is not a supported property
```

I've tried to use your example of React by adding `simple-schema` and I'm getting the exact same error.
It seems like the meteor package is not executed or is using a different version of SimpleSchema.

Or maybe I missed something in how to actually use this package since I don't have much experience in meteor.

Reproduce the error using the package's React example with simple-schema and aldeed:schema-index. Inspect which SimpleSchema version is loaded and whether the Meteor package executes its option extension; done means the example accepts the index property without the unsupported-property error.

Written by the indexing model from the issue text.