Fix INFO parsing

[filmor]

Nothing prevents the server from returning values that contain a colon.

[codecov]

Codecov Report

Merging #405 into master will decrease coverage by 0.16%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #405      +/-   ##
==========================================
- Coverage   96.85%   96.69%   -0.17%     
==========================================
  Files          54       54              
  Lines        7447     7447              
  Branches      525      525              
==========================================
- Hits         7213     7201      -12     
- Misses        171      177       +6     
- Partials       63       69       +6

Impacted Files	Coverage Δ
aioredis/commands/server.py	82.58% <100%> (ø)	⬆️
aioredis/sentinel/pool.py	77.06% <0%> (-3.76%)	⬇️
tests/sentinel_failover_test.py	85.71% <0%> (-1.51%)	⬇️

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[popravich]

Thanks