Currently the arguments when constructing the PARAMS part of a redis query are incorrect.

`queryArgs.param("key", "value")` currently results in:
```
PARAMS 1 key value
```

However, this change would correct it to construct:
```
PARAMS 2 key value
```

I believe the unit tests happen to be passing by pure chance as they are constructing something similar to this at the moment:
```
PARAMS 2 blob blob_data DIALECT 2
```