Put in defaultCompare the constant EQUALS

[christianbender]

After my change I ran the tests successful.

[codecov]

Codecov Report

Merging #59 into master will decrease coverage by 3.61%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #59      +/-   ##
==========================================
- Coverage   65.34%   61.73%   -3.62%     
==========================================
  Files         143      120      -23     
  Lines        3714     2143    -1571     
  Branches      350      297      -53     
==========================================
- Hits         2427     1323    -1104     
+ Misses       1266      807     -459     
+ Partials       21       13       -8

Impacted Files	Coverage Δ
src/js/util.js	100% <ø> (+5%)	⬆️
src/ts/algorithms/backtracking/rat-in-maze.ts	60% <0%> (-20.77%)	⬇️
src/js/data-structures/dictionary.js	87.5% <0%> (-12.5%)	⬇️
src/ts/algorithms/backtracking/sudoku-solver.ts	87.5% <0%> (-7.38%)	⬇️
src/ts/algorithms/sorting/shell-sort.ts	80% <0%> (-6.67%)	⬇️
...rc/ts/algorithms/search/binary-search-recursive.ts	87.5% <0%> (-6.62%)	⬇️
src/js/algorithms/graph/floyd-warshall.js	0% <0%> (-5.89%)	⬇️
src/ts/algorithms/graph/floyd-warshall.ts	0% <0%> (-5.89%)	⬇️
src/js/algorithms/graph/breadth-first-search.js	3.84% <0%> (-4.49%)	⬇️
src/js/algorithms/graph/prim.js	8.33% <0%> (-2.78%)	⬇️
... and 83 more

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