Attempting to serialize components which have rainbow or gradient tags results in the tag getting converted to a lot of individual color tags (see below). It would be useful to keep the rainbow tags when e.g. the user wants to convert from non-strict to strict format.

Original text:
<rainbow>test</rainbow>
Expected output once deserialized and serialized back:
<rainbow>test</rainbow>
Actual output:
<#f3801f>t</#f3801f><#4bff2c>e</#4bff2c><#0c80e0>s</#0c80e0><#b401d3>t</#b401d3>