Update updater endpoint / Release 1.8.0

[circlecube]

This marks the point that plugins will look to the new endpoint for updates. The plugin will then self-update to the new version of the plugin.

Must be coordinated with newfold-labs/wp-plugin-mojo#290

Proposed changes

Type of Change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• Linting and tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[circlecube]

With the tagged release of 3.2.1 in the newfold-labs/wp-plugin-mojo, we're ready for this PR to be reviewed.

See:

• https://github.com/newfold-labs/wp-plugin-mojo/releases/tag/3.2.0 and
• https://github.com/newfold-labs/wp-plugin-mojo/releases/tag/3.2.1

To test, install the build from this PR, activate and you should immediately see a 3.2.1 update available. Updating should be as expected and the new plugin will replace the old.