test: deprecated syntax

[andrewvasilchuk]

Updated tests to avoid using the deprecated syntax of the defineStore function.

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npm i https://pkg.pr.new/@pinia/nuxt@2908

npm i https://pkg.pr.new/pinia@2908

npm i https://pkg.pr.new/@pinia/testing@2908

commit: c9d36df

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.46%. Comparing base (394f655) to head (c9d36df).
Report is 3 commits behind head on v2.

Additional details and impacted files

@@           Coverage Diff           @@
##               v2    #2908   +/-   ##
=======================================
  Coverage   88.46%   88.46%           
=======================================
  Files          19       19           
  Lines        1456     1456           
  Branches      227      227           
=======================================
  Hits         1288     1288           
  Misses        167      167           
  Partials        1        1           

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[posva]

Thanks! This was already added in the PR for pinia 3