Smart serialize of type object

[lmazuel]

Fix #223

[codecov-commenter]

Codecov Report

Merging #224 into master will decrease coverage by 0.44%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #224      +/-   ##
==========================================
- Coverage   86.23%   85.78%   -0.45%     
==========================================
  Files          25       25              
  Lines        2738     2687      -51     
==========================================
- Hits         2361     2305      -56     
- Misses        377      382       +5     

Impacted Files	Coverage Δ
msrest/serialization.py	90.00% <100.00%> (-1.12%)	⬇️
msrest/configuration.py	75.86% <0.00%> (-2.27%)	⬇️
msrest/universal_http/requests.py	82.01% <0.00%> (-0.74%)	⬇️
msrest/paging.py	91.22% <0.00%> (-0.30%)	⬇️
msrest/exceptions.py	87.34% <0.00%> (-0.16%)	⬇️
msrest/universal_http/__init__.py	74.09% <0.00%> (-0.15%)	⬇️
msrest/pipeline/universal.py	94.11% <0.00%> (-0.12%)	⬇️
msrest/pipeline/__init__.py	91.20% <0.00%> (+0.57%)	⬆️
msrest/pipeline/async_abc.py	91.42% <0.00%> (+1.28%)	⬆️
... and 1 more

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