ran bundle update
updates hydra gem to ~> 7.1.0
updates RDF datastream sytnax to use predicate:, etc.
overrides OM datastreams prefixes per AF 8 deprecation warning
clears out array/scalar deprecation warnings
Clears out deprecation warnings from blacklight.
gemfile.lock merge conflict
merge conflict resolution
Merge pull request #312 from pulibrary/hydra_upgrade

Hydra upgrade