Family Day update

Task/Sorting-algorithms-Selection-sort/Crystal/sorting-algorithms-selection-sort.crystal

@@ -0,0 +1,13 @@
+def selectionSort(array : Array)
+    (0...array.size-1).each do |i|
+        nextMinIndex = i
+        (i+1...array.size).each do |j|
+            if array[j] < array[nextMinIndex]
+                nextMinIndex = j
+            end
+        end
+        if i != nextMinIndex
+            array.swap(i, nextMinIndex)
+        end
+    end
+end