FIX: Lax BIDSDataGrabber anatomical requirement

[mgxd]

Closes #411

Pass in new keyword argument added in nipreps/niworkflows#922

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.89%. Comparing base (064edcc) to head (d674601).
Report is 31 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #435   +/-   ##
=======================================
  Coverage   55.89%   55.89%           
=======================================
  Files          69       69           
  Lines        6689     6689           
  Branches      832      832           
=======================================
  Hits         3739     3739           
  Misses       2745     2745           
  Partials      205      205           

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