Cannot use `@actions/github` and `@actions/artifact` together

Describe the bug
Due to differing versions of the Octokit modules, you cannot use these packages together

See https://github.com/octokit/plugin-rest-endpoint-methods.js/issues/737

To Reproduce
Steps to reproduce the behavior:

1. Install @actions/github and @actions/artifact modules
2. Create a TypeScript source file that uses both packages
3. Try to compile the TypeScript source file
4. See error

Expected behavior
For the used versions of Octokit to be in sync and the packages usable together

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

/cc @austenstone

Reproduce the TypeScript compilation error using @actions/github and @actions/artifact as described in the issue, then review how each package resolves its Octokit modules. Use the linked Octokit issue for context; done means both packages compile together with compatible Octokit versions.