fix decode array if received uncomplete data

[estin]

Hi!
This PR must fix #6 (as it usually happens - while asking the question found a solution)

Solution - on decode array all items must be present in buffer
Each array item must have 2 \r\n

*2\r\n$5\r\nhello\r\n$5\r\nworld\r\n
https://redis.io/docs/reference/protocol-spec/#resp-arrays

[fafhrd91]

lgtm. could you add entry to changes

[codecov]

Codecov Report

Base: 71.32% // Head: 66.35% // Decreases project coverage by -4.97% ⚠️

Coverage data is based on head (ca40570) compared to base (074066a).
Patch coverage: 83.22% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master       #7      +/-   ##
==========================================
- Coverage   71.32%   66.35%   -4.97%     
==========================================
  Files          14       14              
  Lines         823      749      -74     
==========================================
- Hits          587      497      -90     
- Misses        236      252      +16     

Impacted Files	Coverage Δ
src/cmd/keys.rs	80.39% <ø> (ø)
src/lib.rs	0.00% <ø> (ø)
src/simple.rs	66.66% <67.64%> (+29.82%)	⬆️
src/cmd/connection.rs	82.14% <77.77%> (+3.19%)	⬆️
src/connector.rs	73.33% <86.66%> (-3.81%)	⬇️
src/cmd/pubsub.rs	88.50% <88.50%> (ø)
src/client.rs	50.00% <100.00%> (+1.78%)	⬆️
src/codec.rs	59.69% <100.00%> (-7.67%)	⬇️
src/cmd/strings.rs	40.81% <0.00%> (-3.19%)	⬇️
... and 4 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[fafhrd91]

thanks!