Force BaseHTTPRequestHandler to use HTTP/1.1 so Chrome respects cache…

[corespace]

… headers

[codecov-io]

Codecov Report

Merging #448 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #448      +/-   ##
==========================================
+ Coverage    93.6%   93.61%   +<.01%     
==========================================
  Files          18       18              
  Lines        2863     2864       +1     
  Branches      375      375              
==========================================
+ Hits         2680     2681       +1     
  Misses        132      132              
  Partials       51       51

Impacted Files	Coverage Δ
chalice/local.py	97.5% <100%> (+0.02%)	⬆️

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[jamesls]

Thanks for the pull request!