Release 0.4.3

[florianm]

Preparation

• Review and merge all outstanding PRs
• Release build2xlsform
• Update and PR the hard-coded build and build2xlsform versions in
  • server/views/index.erb > About
  • docs/deploy.md > Source install
  • docker-compose.yml
• Release versions triple-checked on GitHub master
• On GitHub, create a release from latest master: create new tag of release version on push, auto-generate release notes, add any text.

Acceptance testing

• https://staging.build.getodk.org/ upgraded to latest release following deployment guide for docker-compose
• Staging tested and new features verified (post screenshots / test logs as comments below)
• Core team sign-off for prod server upgrade

Deployment

• https://build.getodk.org/ upgraded
• https://build.getodk.org/ up and running with new version