Bugfix: remove Host from auth header

[fronzbot]

Description:

Removed host from auth header on requests

Related issue (if applicable): fixes #329

Checklist:

• Local tests with tox run successfully PR cannot be meged unless tests pass
• Changes tested locally to ensure platform still works as intended
• Tests added to verify new code works

[codecov]

Codecov Report

Merging #330 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #330   +/-   ##
=======================================
  Coverage   82.34%   82.34%           
=======================================
  Files           8        8           
  Lines         759      759           
=======================================
  Hits          625      625           
  Misses        134      134           

Flag	Coverage Δ
#unittests	82.34% <100.00%> (ø)

Impacted Files	Coverage Δ
blinkpy/blinkpy.py	81.53% <100.00%> (ø)
blinkpy/helpers/constants.py	100.00% <100.00%> (ø)

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