User 1971 as the default min date for order queries

[alexgolec]

Possible close of #205

[codecov]

Codecov Report

Merging #248 (63bf093) into master (b5293cc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #248   +/-   ##
=======================================
  Coverage   99.57%   99.57%           
=======================================
  Files          19       19           
  Lines        2113     2113           
  Branches      199      199           
=======================================
  Hits         2104     2104           
  Misses          4        4           
  Partials        5        5           

Flag	Coverage Δ
unittests	99.57% <ø> (ø)

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Impacted Files	Coverage Δ
tda/client/base.py	99.53% <ø> (ø)

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