Extracts the style attribues from an AbstractSyntaxTree and formats those
values in the inline style attribute format.

@param  {AbstractSyntaxTree} filteredAST
@return {string}             - Example: "color:yellow;text-align:center;font-family:helvetica;"
function stringifyStyleAttributes(filteredAST) {
    return filteredAST.nodes[0].nodes
      .reduce(function(extractedAttributes, attributeObject) {
        extractedAttributes.push(
          attributeObject.prop + ':' + attributeObject.value
        );
        return extractedAttributes;
      }, [])
      .join(';');
  }