feat: add deprecate.property()

[ckerr]

Does what it says on the tin.

• re-add deprecate.property()
• add a property setter
• add getter & setter tests
• test to see if deprecated property is set when deprecate.property() is called

This is in preparation for planned object property deprecations in 3.0, e.g. blinkFeatures -> enaleBlinkFeatures

This eliminates copy-and-paste repetition for each deprecated property (example) but is a little more heavyweight, so I'd like a second opinion on this replacement.