Adding swift macros repositories to resources

[maiamiguel]

Thanks for your contribution! This is a template that can make it easier when submitting your contribution:

Your Project: A list of swift Macros Project URL: https://github.com/krzysztofzablocki/Swift-Macros Category: Swift Macros Description: This domain is for use in illustrative examples in documents.

Inclusion requirements:

• [x] Has 50 GitHub stargazers or more
• [x] Only one project/change is in this pull request
• [x] Isn't an archived project
• [x] Has more than one contributor
• [x] Has unit tests, integration tests or UI tests
• [ ] Addition in alphabetical order (bottom of category)
• [x] Supports iOS 12 / tvOS 10 or later
• [x] Supports Swift 4 or later
• [x] Has a commit from less than 2 years ago
• [x] Has a clear README in English

:heart: Awesome iOS Contributors

[vsouza]

@maiamiguel Thanks for contributing!