fix cacheKey property name

[thomas-topway-it]

• fixes datatable not redrawing after filter, in conjunction with cache

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.09%. Comparing base (eda0973) to head (a455b0e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #987   +/-   ##
=========================================
  Coverage     45.09%   45.09%           
  Complexity     2422     2422           
=========================================
  Files            81       81           
  Lines          9197     9197           
=========================================
  Hits           4147     4147           
  Misses         5050     5050           

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