trait for brevity SeoAwareTrait

                   
|Q            |A  |
|---          |---|
|Bug Fix?     |n  |
|New Feature? |n  |
|BC Breaks?   |n  |
|Deprecations?|n  |
|Tests Pass?  |n  |
|Fixed Tickets|  #186  |
|License      |MIT|
|Doc PR       |   |
                   


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@ElectricMaxxx we don't typehint an interface, since we used this to transform the metadata into an array just before saving (and thus calling this method with an array instead of an SeoMetadataInterface).

We forgot to do readd it for 1.0 and we can't do it now because of BC reasons.