Error with regex queries

I get following error when trying to use a query with regular expression (like `{ name: /^A/ }`).

`Error: Cannot encode unknown type: /^test/`

I do not use `bytewise` encoding for the keys, if this is neccessary it would be nice if you add it to the usage part in the readme.

So, long story short, i cannot perform regex queries when exactly using the example from the readme.