feat(options): add allowMultiple to options

[jpsc]

Specifies a boolean flag (allowMultiple) which if set to true allows reading multiple cookies with same name (key) and returning values in an array.

closes #51

[pi0]

Thanks for PR. I am still not sure which method to go but am more towards last option (of joining with , ). because of this edge case, all code logic after this (which is a breaking change) need to check for array format.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (44b65da) to head (19a8562).
Report is 41 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #55   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         7    +6     
  Lines          243       295   +52     
  Branches        66       114   +48     
=========================================
+ Hits           243       295   +52     

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[jpsc]

Thanks for PR. I am still not sure which method to go but am more towards last option (of joining with , ). because of this edge case, all code logic after this (which is a breaking change) need to check for array format.

Makes sense! Specially the breaking change part. I've updated the PR 👍