Remove hiredis dependency

[ziggi]

Related to #256

cote depends on @dashersw/node-discover^1.0.5
@dashersw/node-discover^1.0.5 depends on redis^2.7.1"
redis^2.7.1" depends on redis-parser^2.6.0
redis-parser^2.6.0 depends on hiredis^0.5.0

So, It would be nice to bump redis version to 3.0.0+ where hiredis dependency was removed (redis changelog)

[dashersw]

Thank you @ziggi! I'll have a look at this over the weekend.

[mikey0000]

Update to use node-redis instead or add as peer dependency please.