Bump octokit/rest to v21

[Kesin11]

fix: #1113

Since v21.0.0, octokit/rest has been ESM.

[Kesin11]

It seems octokit/core that is peerDependency from @octokit/plugin-paginate-rest is conflicted.
@octokit/plugin-paginate-rest restricts @octokit/core to v5 by octokit/plugin-paginate-rest.js#597.

$ npm i
npm WARN ERESOLVE overriding peer dependency
npm WARN While resolving: @octokit/[email protected]
npm WARN Found: @octokit/[email protected]
npm WARN node_modules/@octokit/rest/node_modules/@octokit/core
npm WARN   peer @octokit/core@"5" from @octokit/[email protected]
npm WARN   node_modules/@octokit/rest/node_modules/@octokit/plugin-paginate-rest
npm WARN     @octokit/plugin-paginate-rest@"^11.0.0" from @octokit/[email protected]
npm WARN     node_modules/@octokit/rest
npm WARN   1 more (@octokit/plugin-rest-endpoint-methods)
npm WARN 
npm WARN Could not resolve dependency:
npm WARN peer @octokit/core@">=6" from @octokit/[email protected]
npm WARN node_modules/@octokit/rest/node_modules/@octokit/plugin-request-log
npm WARN   @octokit/plugin-request-log@"^5.1.0" from @octokit/[email protected]
npm WARN   node_modules/@octokit/rest
npm WARN 
npm WARN Conflicting peer dependency: @octokit/[email protected]
npm WARN node_modules/@octokit/core
npm WARN   peer @octokit/core@">=6" from @octokit/[email protected]
npm WARN   node_modules/@octokit/rest/node_modules/@octokit/plugin-request-log
npm WARN     @octokit/plugin-request-log@"^5.1.0" from @octokit/[email protected]
npm WARN     node_modules/@octokit/rest
npm WARN EBADENGINE Unsupported engine {
npm WARN EBADENGINE   package: '[email protected]',
npm WARN EBADENGINE   required: { node: '>=20.14.0' },
npm WARN EBADENGINE   current: { node: 'v20.11.1', npm: '10.2.4' }
npm WARN EBADENGINE }

[github-actions]

Code Metrics Report

	master (7e08d6e)	octokit_v21 (83c2796)	+/-
Coverage	40.9%	40.9%	0.0%
Test Execution Time	5s	5s	0s

Details

  |                     | master (7e08d6e) | octokit_v21 (83c2796) | +/-  |
  |---------------------|------------------|-----------------------|------|
  | Coverage            |            40.9% |                 40.9% | 0.0% |
  |   Files             |               43 |                    43 |    0 |
  |   Lines             |             5789 |                  5789 |    0 |
  |   Covered           |             2368 |                  2368 |    0 |
  | Test Execution Time |               5s |                    5s |   0s |

---

Reported by octocov

[Kesin11]

After reinstalling all octokit packages and re-creating package-lock.json, @octokit/[email protected] is picked and everything was resolved.