Add support for connections_max_idle_ms config.

[tvoinarovskyi]

No description provided.

[codecov-io]

Codecov Report

Merging #113 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
+ Coverage   96.55%   96.59%   +0.03%     
==========================================
  Files          10       10              
  Lines        1771     1789      +18     
==========================================
+ Hits         1710     1728      +18     
  Misses         61       61

Impacted Files	Coverage Δ
aiokafka/consumer.py	98.52% <ø> (ø)	✅
aiokafka/conn.py	100% <100%> (ø)	✅
aiokafka/client.py	98.22% <100%> (ø)	✅

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 09b9100...35d75e3. Read the comment docs.