REST: Changed "endpoint" to optional

[mirao]

Motivation/Description of the PR

When I switched to TypeScript config in CodeceptJS 3.3.5, CodeceptJS forced me to specify endpoint: "" though I don't use this property at all. Every REST API call in my tests is performed to absolute URL http(s):// (because test switches between several servers), so I don't need endpoint Moreover I noticed that default value of endpoint in REST helper is already an empty string, so I think that it's not needed to specify it from test's config: https://github.com/codeceptjs/CodeceptJS/blob/3.x/lib/helper/REST.js#L62

Applicable helpers:

• [ ] WebDriver
• [ ] Puppeteer
• [ ] Nightmare
• [x] REST
• [ ] FileHelper
• [ ] Appium
• [ ] Protractor
• [ ] TestCafe
• [ ] Playwright

Applicable plugins:

• [ ] allure
• [ ] autoDelay
• [ ] autoLogin
• [ ] customLocator
• [ ] pauseOnFail
• [ ] coverage
• [ ] retryFailedStep
• [ ] screenshotOnFail
• [ ] selenoid
• [ ] stepByStepReport
• [ ] stepTimeout
• [ ] wdio
• [ ] subtitles

Type of change

• [ ] :fire: Breaking changes
• [ ] :rocket: New functionality
• [x] :bug: Bug fix
• [ ] :clipboard: Documentation changes/updates
• [ ] :hotsprings: Hot fix
• [ ] :hammer: Markdown files fix - not related to source code
• [ ] :nail_care: Polish code

Checklist:

• [ ] Tests have been added
• [ ] Documentation has been added (Run npm run docs)
• [x] Lint checking (Run npm run lint)
• [x] Local tests are passed (Run npm test)

[mirao]

It looks like the failed test sometimes passes and sometimes fails (tested even in my local environment). BTW is it possible to re-run the job in GitHub Actions? I didn't find a way how to do it.

[DavertMik]

Thanks, i didn't think of that I will look and merge PR before release