fix(vue): update vue app

[lojzatran]

As we have a critical error in one of the dependencies used in the vue example app, I tried to update it to newest version: https://github.com/commercetools/commercetools-sdk-typescript/security/dependabot/88.
I could start the app, but it throws error when connecting to CTP.

[changeset-bot]

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Latest commit: de264df

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.83%. Comparing base (bd61a68) to head (de264df).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #664   +/-   ##
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  Coverage   92.83%   92.83%           
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  Files          25       25           
  Lines         279      279           
  Branches       12       12           
=======================================
  Hits          259      259           
  Misses         20       20           

Flag	Coverage Δ
integrationtests	92.83% <ø> (ø)

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