[data-shapes] Add support for Node Expressions as sh:deactivated parameter (#338)

bergos has just created a new issue for https://github.com/w3c/data-shapes:

== Add support for Node Expressions as sh:deactivated parameter ==
It should be possible to dynamically deactivate shapes using Node Expressions as a parameter for the `sh:deactivated`. The allowed object values must be extended, and the expected return type must be defined.

Please view or discuss this issue at https://github.com/w3c/data-shapes/issues/338 using your GitHub account


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