Support dial options

[damikem]

add options for dial when connecting to Redis (allowing to control options such as read/write/connect timeout, keep alive and more)

[codecov]

Codecov Report

Merging #27 (5675347) into master (3da966a) will increase coverage by 0.04%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master      #27      +/-   ##
==========================================
+ Coverage   86.84%   86.89%   +0.04%     
==========================================
  Files           2        2              
  Lines         266      267       +1     
==========================================
+ Hits          231      232       +1     
  Misses         20       20              
  Partials       15       15              

Impacted Files	Coverage Δ
client.go	89.42% <50.00%> (ø)
pool.go	72.50% <100.00%> (+0.70%)	⬆️

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[dengliming]

👍

[filipecosta90]

@damikem LGTM but we need to add a new method instead of changing the old one so that we're retrocompatible. Can we add a NewClientWithOptions ? Glad to help if required :)