lb4 update is stuck to tslib ^2.0.0

## Steps to reproduce

execute lb4 update

## Current Behavior
(excuse my french ;-) )
$ lb4 update
Le projet a été généré à l'origine par @loopback/cli@.
Les dépendances suivantes sont incompatibles avec @loopback/cli@3.0.0 :
dependencies
- tslib: ^2.3.1 (cli ^2.0.0)
devDependencies
peerDependencies
? Que souhaitez-vous faire ? Ignorer la mise à niveau des dépendances du projet

## Expected Behavior

lb4 update should not warn about tslib@2.3.1 compatibility

## Link to reproduction sandbox

N/A

## Additional information

N/A

## Related Issues

N/A

Start by reproducing the problem with `lb4 update` and inspect how the CLI checks project dependencies against its supported versions. Focus on the `tslib` compatibility warning for `tslib ^2.3.1` versus the CLI's reported `^2.0.0`; done means the update no longer warns for that compatible version.

Written by the indexing model from the issue text.