v582

Merge pull request #4398 from alphagov/dependabot/bundler/govuk_publi…

v581

Merge pull request #4397 from alphagov/dependabot/bundler/gds-api-ada…

v580

Merge pull request #4393 from alphagov/amend-hero

Adjust hero images

v579

Merge pull request #4396 from alphagov/fix-jasmine

Fix jasmine and pact tests not running in govuk-docker

v578

Merge pull request #4395 from alphagov/keep-nil-statistics-values

Stop converting nil graph values to zero

v577

Merge pull request #4305 from alphagov/move-get-involved-document

Move get involved document

v576

Merge pull request #4394 from alphagov/dependabot/bundler/gds-api-ada…

v575

Merge pull request #4391 from alphagov/use-gem-list-on-help

Swap Design System list for gem list on /help

v574

Merge pull request #4386 from alphagov/dependabot/bundler/govuk_publi…

v573

Merge pull request #4388 from alphagov/update-heroku

Update heroku configuration