declare_exchange in channel now timeout parameter to exchange.declare

[AndreasPresthammer]

The timeout value for channel.declare_exchange(timeout) wasn't passed along to yield from exchange.declare()

[coveralls]

Coverage remained the same at 91.113% when pulling b550980 on AndreasPresthammer:ExchangeDeclareMissingTimeout into 38fd589 on mosquito:master.

[coveralls]

Coverage remained the same at 91.113% when pulling b550980 on AndreasPresthammer:ExchangeDeclareMissingTimeout into 38fd589 on mosquito:master.

[codecov-io]

Codecov Report

Merging #120 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #120   +/-   ##
=======================================
  Coverage   87.58%   87.58%           
=======================================
  Files          20       20           
  Lines        1474     1474           
  Branches      141      141           
=======================================
  Hits         1291     1291           
  Misses        131      131           
  Partials       52       52

Impacted Files	Coverage Δ
aio_pika/channel.py	92.34% <100%> (ø)	⬆️

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