Update CHANGELOG.md

Update CHANGELOG.md

Merge branch 'master' of https://github.com/Kapeli/Dash-iOS

Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Merge branch 'master' of https://github.com/Kapeli/Dash-iOS

Update CHANGELOG.md

Release version 1.8.4