Getting this the deprecation warning during build on the dev-multidev / pantheon deployment step:
Deprecated: Creation of dynamic property Pantheon\TerminusBuildTools\Credentials\CredentialManager::$cache is deprecated in /home/tester/.terminus/terminus-dependencies-e227447905/vendor/pantheon-systems/terminus-build-tools-plugin/src/Credentials/CredentialManager.php on line 21
Getting this the deprecation warning during build on the dev-multidev / pantheon deployment step: