Bump actions/checkout from 2.3.4 to 4.1.1 (#150)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.3.4 to 4.1.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.4...v4.1.1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Merge pull request #151 from shipkit/sf

Upgraded to Gradle 7 and other dependency versions

Merge pull request #152 from shipkit/magneticflux--master

Make workingDir property internal and only expose the .git directory

Revert "Bump plugin-publish-plugin from 0.15.0 to 1.1.0"

This reverts commit 3d6a51d.

Merge pull request #124 from shipkit/sf--update-release

Added support for updating releases

Merge pull request #98 from shestee/master

Add logo to README.md

Merge pull request #95 from shestee/master

Remove duplicated code in test

Merge pull request #93 from shipkit/sf

Improved flexibility for tag and main dev branch conventions

Fixed Shipkit link and tests

Merge pull request #91 from shipkit/sf

Removed deprecated jCenter()