Update shows when key is invalid

[jamesckemp]

Steps to reproduce:

1. On your test site, install and activate the latest version (for example, 1.2.0)
2. On PUE, the latest release should be less than your test version (for example, 1.1.0)
3. Enter an invalid license key on the test site.

The issue:

Code: https://github.com/stellarwp/uplink/blob/main/src/Uplink/Resources/Plugin.php#L72-L78

These lines of code add a "fake update" if the update response is expired or invalid. The reason this "fake update" is added, is so we can display a message on the plugins list about updating your license.

However, these lines are added outside of the version check, which means they are added even if no update is available.

Because these lines are added to the transient, WordPress sees that an update is available and shows it on the update-core.php admin page as available.

Potential solution:

These lines should be added inside the version check conditional.