timeout=0 takes precedence over self.timeout

[argaen]

Fixes #226

[codecov-io]

Codecov Report

Merging #227 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #227   +/-   ##
=======================================
  Coverage   98.94%   98.94%           
=======================================
  Files          12       12           
  Lines         662      662           
  Branches       74       74           
=======================================
  Hits          655      655           
  Misses          7        7

Impacted Files	Coverage Δ
aiocache/base.py	100% <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 a96bead...3751636. Read the comment docs.