fix: ignore invalid keys in query strings (all keys in default object)

[xiel]

• fixes a similar bug as [security] Prevent overriding of build-in properties by default unshiftio/querystringify#19

[codecov-io]

Codecov Report

Merging #56 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #56      +/-   ##
==========================================
+ Coverage   99.15%   99.16%   +<.01%     
==========================================
  Files          24       24              
  Lines         237      239       +2     
  Branches       50       51       +1     
==========================================
+ Hits          235      237       +2     
  Misses          1        1              
  Partials        1        1

Impacted Files	Coverage Δ
.../packages/query-state-core/src/query-state-core.ts	100% <100%> (ø)	⬆️

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