DIALS 3.9.0 release

Development towards xia2 3.9.0

Development towards xia2 3.8.0

DIALS 3.8.1

Improved Documentation
----------------------

- ``xia2.multiplex``: Add, and update, PHIL parameter descriptions. (xia2#644)

DIALS 3.8.0 release

xia2 3.7.0 Changelog

    towncrier --name=xia2 --version='3.7.0'

Development towards xia2 3.7.0

xia2 3.6.0

Development towards xia2 3.6.0

Bump version: 3.4.dev → 3.5.0

Minor version bump was missed last time.