Add tasks for all the new languages

Task/Deepcopy/Sidef/deepcopy.sidef

@@ -0,0 +1,15 @@
+var src = Hash(foo => 0, bar => [0,1])
+
+# Add a cyclic reference
+src{:baz} = src
+
+# Make a deep clone
+var dst = src.dclone
+
+# The address of src
+say src.object_id
+say src{:baz}.object_id
+
+# The address of dst
+say dst.object_id
+say dst{:baz}.object_id