add no_wildcard_variable_uses; rev to a new major version

[devoncarew]

• add no_wildcard_variable_uses; rev to a new major version
• closes Consider adding no_wildcard_variable_uses to core dart-lang/core#805

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[devoncarew]

This stages this change for the next time we publish a major release of package:lints (likely not for at least 1-2 quarters; previously thinking on the publish cadence has been ~yearly).

cc @pq @natebosch

[parlough]

Cool!