perf(object-hash): avoid splice method to insert values

[H4ad]

Inspired by puleos/object-hash#122

perf: avoid splice method to insert values

If possible, I prefer to avoid splice and any other method to modify the array is is possible.

'splice x 8,139,878 ops/sec ±1.25% (89 runs sampled)',
'unshift x 7,932,324 ops/sec ±0.97% (94 runs sampled)',
'Array.prototype.push.apply x 14,664,082 ops/sec ±1.09% (90 runs sampled)'

Benchmark: bench-splice-vs-push-js

[codecov]

Codecov Report

Merging #35 (ac8608b) into main (23431de) will decrease coverage by 0.27%.
The diff coverage is 66.66%.

❗ Current head ac8608b differs from pull request most recent head 49a1968. Consider uploading reports for the commit 49a1968 to get more accurate results

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   80.37%   80.10%   -0.27%     
==========================================
  Files           8        8              
  Lines         968      980      +12     
  Branches      125      127       +2     
==========================================
+ Hits          778      785       +7     
- Misses        190      195       +5     

Impacted Files	Coverage Δ
src/object-hash.ts	62.97% <66.66%> (-0.15%)	⬇️

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