Build(example)/Update @nestjs/testing dependency in package.json for compatibility

[KantaHasegawa]

Thank you for providing me with a great library!
A broken dependency in the example directory has been corrected.

@nestjs/testing ^8.2.6 → ^9.2.0

node version v21.6.2

npm i

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: @nestjs/[email protected]
npm ERR! node_modules/@nestjs/common
npm ERR!   @nestjs/common@"^9.2.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer @nestjs/common@"^8.0.0" from @nestjs/[email protected]
npm ERR! node_modules/@nestjs/testing
npm ERR!   dev @nestjs/testing@"^8.2.6" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR!
npm ERR! For a full report see:
npm ERR! /Users/kanta/.npm/_logs/2024-02-29T09_20_50_928Z-eresolve-report.txt

npm ERR! A complete log of this run can be found in: /Users/kanta/.npm/_logs/2024-02-29T09_20_50_928Z-debug-0.log

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/adrianbrs/nest-oidc-provider/blob/main/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[KantaHasegawa]

@adrianbrs

[adrianbrs]

Thanks @KantaHasegawa! Sorry for the long delay.
I'll definitely be paying more attention to this package from now on.