Fix Keyv.Options type incorrectly defines store option type

[dylanseago]

• Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/jaredwray/keyv/blob/main/CODE_OF_CONDUCT.md
• Tests for the changes have been added (for bug fixes/features) with 100% code coverage.
• Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Bug fix Keyv.Options type incorrectly defines store option type #404

• What is the current behavior? (You can also link to an open issue here)
  Keyv.Options type incorrectly defines store option type #404

• What is the new behavior (if this is a feature change)?

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
  This may impact some typescript users

• Other information:

[codecov]

Codecov Report

Merging #405 (b381679) into main (a308268) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #405   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           18        18           
  Lines         1113      1113           
=========================================
  Hits          1113      1113           

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