- Update to 2.6.0
* AsdfDeprecationWarning now subclasses DeprecationWarning. [#710]
* Resolve external references in custom schemas, and deprecate
asdf.schema.load_custom_schema. [#738]
* Add ``asdf.info`` for displaying a summary of a tree, and
``AsdfFile.search`` for searching a tree. [#736]
* Add pytest plugin option to skip warning when a tag is
unrecognized. [#771]
* Fix generic_io ``read_blocks()`` reading past the requested size [#773]
* Add support for ASDF Standard 1.5.0, which includes several new
transform schemas. [#776]
* Enable validation and serialization of previously unhandled numpy
scalar types. [#778]
* Fix handling of trees containing implicit internal references and
reference cycles. Eliminate need to call ``yamlutil.custom_tree_to_tagged_tree``
and ``yamlutil.tagged_tree_to_custom_tree`` from extension code,
and allow ``ExtensionType`` subclasses to return generators. [#777]
* Fix bug preventing history entries when a file was previously
saved without them. [#779]
* Update developer overview documentation to describe design of changes
to handle internal references and reference cycles. [#781]