Fixed some return type deprecation messages

src/DataTables/Adapters/CustomFetchJoinORMAdapter.php

@@ -38,7 +38,7 @@ use Omines\DataTablesBundle\Adapter\Doctrine\FetchJoinORMAdapter;
  */
 class CustomFetchJoinORMAdapter extends FetchJoinORMAdapter
 {
-    public function getCount(QueryBuilder $queryBuilder, $identifier)
+    public function getCount(QueryBuilder $queryBuilder, $identifier): ?int
     {
         $qb_without_group_by = clone $queryBuilder;
 

src/DataTables/Column/PrettyBoolColumn.php

@@ -41,7 +41,7 @@ class PrettyBoolColumn extends AbstractColumn
         return (bool) $value;
     }
 
-    public function render($value, $context)
+    public function render($value, $context): string
     {
         if ($value === true) {
             return '<span class="badge bg-success"><i class="fa-solid fa-circle-check fa-fw"></i> '

src/DataTables/Column/RowClassColumn.php

@@ -27,7 +27,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 class RowClassColumn extends AbstractColumn
 {
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): self
     {
         parent::configureOptions($resolver);
 

src/DataTables/Column/SIUnitNumberColumn.php

@@ -33,7 +33,7 @@ class SIUnitNumberColumn extends AbstractColumn
         $this->formatter = $formatter;
     }
 
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): self
     {
         parent::configureOptions($resolver);
 

src/DataTables/Column/SelectColumn.php

@@ -28,7 +28,7 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
  */
 class SelectColumn extends AbstractColumn
 {
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): self
     {
         parent::configureOptions($resolver);
 
@@ -48,7 +48,7 @@ class SelectColumn extends AbstractColumn
         return $value;
     }
 
-    public function render($value, $context)
+    public function render($value, $context): string
     {
         //Return empty string, as it this column is filled by datatables on client side
         return '';