update 1.0.8.0

Commits for version update

vendor/maatwebsite/excel/docs/export/merge.md

@@ -0,0 +1,19 @@
+# Column merging
+
+### Merging cells
+
+To merge a range of cells, use `->mergeCells($range)`.
+
+    $sheet->mergeCells('A1:E1');
+
+### Merging columns and rows
+
+To merge columns and rows, use `->setMergeColumn($array)`.
+
+    $sheet->setMergeColumn(array(
+        'columns' => array('A','B','C','D'),
+        'rows' => array(
+            array(2,3),
+            array(5,11),
+        )
+    ));