- solr.xslt autor and author_sort are now sorted by @SortOrder

- composer updates
- new artisan command 'update:dataset {dataset : The ID of the dataset}' for updating solr index for specific datasets
- DatasetExtension.php: alaso svae 'sort_order' for authors and contributors
- twice solr.xslt: sort authors also in solr index

app/Library/Search/SolariumAdapter.php

@@ -95,7 +95,7 @@ class SolariumAdapter
 
         foreach ($documents as $document) {
             if (!($document instanceof Dataset)) {
-                throw new InvalidArgumentException("invalid dataset in provided set");
+                throw new \InvalidArgumentException("invalid dataset in provided set");
             }
         }