Fixes #129: Add 2.11 sanity ignore file.

[geerlingguy]

Closes #129.

[codecov]

Codecov Report

Merging #130 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #130   +/-   ##
=======================================
  Coverage   42.56%   42.56%           
=======================================
  Files           3        3           
  Lines         545      545           
  Branches      110      110           
=======================================
  Hits          232      232           
  Misses        270      270           
  Partials       43       43           

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