Update to XML Builder 1+

What's Changed

• preparing major by @joshbruce in #3

Full Changelog: 0.6.0...1.0.0

Update to PHP 8+, improving type safety

What's Changed

• Update project by @joshbruce in #2

Full Changelog: 0.5.3...0.6.0

Add string to viable Document::body types

0.5.3

add string to body types

Accommodate empty string passed to props

0.5.2

accommodate empty property string

Apply Buildable contract from XML Builder

Full Changelog: 0.5.0...0.5.1

Initial release

0.5.0

Update SECURITY.md