Add a check for yarn versions. For non-JS people in a Ruby project it can be very confusing if JS isn't their normal ecosystem. This commit provides a message to positively know what is wrong with relation to yarn versions.
Add a check for yarn versions.
For non-JS people in a Ruby project it can be very confusing if JS isn't their normal ecosystem. This commit provides a message to positively know what is wrong with relation to yarn versions.

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic