deps: fix high security alerts from Dependabot

[sbosio]

Summary

Here we remove unused dependencies and update versions to address multiple high security alerts from Dependabot.

Type of Change

Breaking Changes (major semver update)

• Add a ! after your change type to denote a change that breaks current behavior

Feature Additions (minor semver update)

• feat: Introduces a new feature to the codebase

Patch Updates (patch semver update)

• fix: Bug fix
• deps: Dependency upgrade
• revert: Revert a previous commit
• chore: Change that does not affect production code
• refactor: Refactoring existing code without changing behavior
• test: Add/update/remove tests

Testing

No functional changes. Passing CI suffices.

Related Issues

Github Dependabot security alerts fixed:

• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/94
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/92
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/98
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/99
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/100
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/96
• https://github.com/heroku/heroku-data-privatelink-cli/security/dependabot/93

[michaelmalave]

LGTM!