1.0.0

Enhancements:

• Added support FT.CONFIG command (#60)
• Allow empty group_by([], reducer) ie. GROUPBY 0 (#68)
• Added support for ADDHASH command (#69)
• Added support for 'DD' parameter in FT.DEL command (#69)

Fixes

• fixed an error while using cursor in aggregate (#69)
• use six library for isinstance (#66)

Thanks to: @dipinarora9 @quintonparker @rednafi for the contributing!