fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - @loopback/repository from 7.0.2 to 7.0.5.
    See this package in npm: https://www.npmjs.com/package/@loopback/repository
  - @loopback/boot from 7.0.2 to 7.0.5.
    See this package in npm: https://www.npmjs.com/package/@loopback/boot
  - @loopback/context from 7.0.2 to 7.0.5.
    See this package in npm: https://www.npmjs.com/package/@loopback/context
  - @loopback/core from 6.0.2 to 6.1.2.
    See this package in npm: https://www.npmjs.com/package/@loopback/core

See this project in Snyk:
https://app.snyk.io/org/ashishkaushik/project/f76bdd59-5144-494e-8d4d-bcb7b855e63e?utm_source=github&utm_medium=referral&page=upgrade-pr