Work CI-CD

- Temporarily disable publishing nuget helpers from main.

Merge pull request nanoframework#2021 from nanoframework/release-v1.6.6

Release release-v1.7.0

Release release-v1.6.5


***PUBLISH_RELEASE***

Work CI-CD

- Rename master with main.

Work CI-CD

- Set Ruby version to 2.7.

Update Windows.Devices.Spi declaration (nanoframework#1732)

Merge pull request nanoframework#1731 from nanoframework/release-v1.5.0

Release release-v1.5.0

Work CD-CI

- ZIP files are now added to artifacts.
- GitHub release is now created on build from master.
- Drop preview from version.
- Bump release version to 1.4.2.

Merge pull request nanoframework#1458 from nanoframework/release-v1.3.2

Release 1.3.2