Fix deprecated uses of `Redis#pipelined` (#150)
Fix deprecated uses of `Redis#pipelined` (#150)

Context: https://github.com/redis/redis-rb/pull/1059

The following is deprecated
```ruby
redis.pipelined do
  redis.get(key)
end
```

And should be rewritten as:
```ruby
redis.pipelined do |pipeline|
  pipeline.get(key)
end
```

Functionally it makes no difference.
This API is available since Redis 3.0.

Co-authored-by: Jean Boussier <484ba99a5d5a5fe782b11ea1b46f69a34139f585@gmail.com>
bolshakov/stoplight