Add tasks for all the new languages

Task/XML-DOM-serialization/Lasso/xml-dom-serialization.lasso

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+content_type( 'text/xml' );// set MIME type if serving
+
+xml( '<?xml version="1.0" ?><root><element>Some text here</element></root>' );

Task/XML-DOM-serialization/Lingo/xml-dom-serialization.lingo

@@ -0,0 +1,14 @@
+-- create an XML document
+doc = newObject("XML", "<?xml version='1.0' ?>")
+
+root = doc.createElement("root")
+doc.appendChild(root)
+
+element = doc.createElement("element")
+root.appendChild(element)
+
+textNode = doc.createTextNode("Some text here")
+element.appendChild(textNode)
+
+put doc.toString()
+-- "<?xml version='1.0' ?><root><element>Some text here</element></root>"

Task/XML-DOM-serialization/Nim/xml-dom-serialization.nim

@@ -0,0 +1,13 @@
+import xmldom
+
+var
+  dom = getDOM()
+  document = dom.createDocument("", "root")
+  topElement = document.documentElement
+  firstElement = document.createElement "element"
+  textNode = document.createTextNode "Some text here"
+
+topElement.appendChild firstElement
+firstElement.appendChild textNode
+
+echo document

Task/XML-DOM-serialization/Sidef/xml-dom-serialization.sidef

@@ -0,0 +1,5 @@
+require('XML::Simple');
+print %S'XML::Simple'.XMLout(
+    :(root => :( element => 'Some text here' )),
+    NoAttr => 1, RootName => '',
+);