Merge pull request #86 from dercodercom/patch-3

fix orderBy string numbers

src/PowerGridComponent.php

@@ -324,7 +324,7 @@ public function fillData()
                     ->setFilters($this->filters)
                     ->filterContains()
                     ->filter();
-            })->orderBy($this->sortField, $this->sortDirection);
+            })->orderByRaw("$this->sortField+0 $this->sortDirection")->orderBy($this->sortField, $this->sortDirection);
 
         if ($this->perPage > 0) {
             $results = $results->paginate($this->perPage);