Make wrap function more generic (TS)

[qqilihq]

Instead of

export declare function wrap<D extends Document>(model: Model<D>): Model<D>;

… it should probably rather be …:

export declare function wrap<D extends Document, M extends Model<D>>(model: M): M;

So that it plays will e.g. with @casl/mongoose.

[qqilihq]

Or even simpler:

export declare function wrap<M extends Model<any>>(model: M): M;