FIX: Make lists and dicts hashable

[bpinsard]

sets #684 up-to-date with master branch.

should fix #834

[codecov]

Codecov Report

Attention: Patch coverage is 84.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.45%. Comparing base (2c0469b) to head (234f624).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/bids/layout/layout.py	50.00%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1112   +/-   ##
=======================================
  Coverage   89.44%   89.45%           
=======================================
  Files         130      130           
  Lines       14232    14278   +46     
  Branches     1672     1680    +8     
=======================================
+ Hits        12730    12772   +42     
- Misses       1104     1106    +2     
- Partials      398      400    +2     

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[effigies]

Thanks for refreshing this!

[bpinsard]

4 years was a bit too old :D

Thanks for merging this fast!