bug: migrate command should show an error if npm install failed

[jcesarmobile]

Bug Report

Capacitor Version

4

Platform(s)

CLI

Current Behavior

npm install can fail sometimes on migrate command and the user is not aware

Expected Behavior

should show an error to the user telling them npm install failed

Code Reproduction

install some plugin that has a peer dependency to capacitor 3, i.e npm install @capacitor-community/barcode-scanner@2 and run migrate command.

Other Technical Details

npm --version output:

node --version output:

pod --version output (iOS issues only):

Additional Context

[ionitron-bot]

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