Llbase

<!-- Release notes generated using configuration in .github/release.yaml at main -->

What's Changed
Other Changes
* Reinstate llbase.fastest_elementtree (proxy for module in llsd) by nat-goodspeed in https://github.com/secondlife/python-llbase/pull/2

New Contributors
* nat-goodspeed made their first contribution in https://github.com/secondlife/python-llbase/pull/2

**Full Changelog**: https://github.com/secondlife/python-llbase/compare/v1.3.0...v1.3.1

<!-- Release notes generated using configuration in .github/release.yaml at main -->

What's Changed
Other Changes
* Update package build methods for 2022 by bennettgoble in https://github.com/secondlife/python-llbase/pull/1

New Contributors
* bennettgoble made their first contribution in https://github.com/secondlife/python-llbase/pull/1

**Full Changelog**: https://github.com/secondlife/python-llbase/compare/0.2.0...v1.3.0

<!-- Release notes generated using configuration in .github/release.yaml at main -->

First GitHub-based release of llbase.

What's Changed
Other Changes
* Adopted external [llsd](https://github.com/secondlife/python-llsd) package
* Update package build methods for 2022 by bennettgoble in https://github.com/secondlife/python-llbase/pull/1

New Contributors
* bennettgoble made their first contribution in https://github.com/secondlife/python-llbase/pull/1

**Full Changelog**: https://github.com/secondlife/python-llbase/commits/v1.3.0-beta1