v1578

Merge pull request #9860 from alphagov/dependabot/bundler/pdf-reader-…

v1575

Merge pull request #9863 from alphagov/fix_heading_spacing

Add margin_bottom to heading_options

v1574

Merge pull request #9862 from alphagov/content-modelling/make-change-…

v1573

Merge pull request #9856 from alphagov/add-kyrgyz

Add Kyrgyz to Whitehall

v1572

Merge pull request #9855 from alphagov/refactor-locales

Stop repeating locale keys

v1570

Merge pull request #9845 from alphagov/remove-unused-locales

Remove unused locales

v1569

Merge pull request #9854 from alphagov/remove-mechanize-dev-gem

Remove mechanize gem from development dependencies

v1568

Merge pull request #9852 from alphagov/content-modelling/832-notes-on…

v1567

Merge pull request #9853 from alphagov/remove-direct-rackup-dependency

Remove direct rackup dependency

v1566

Merge pull request #9809 from alphagov/dependabot/npm_and_yarn/eslint…