Release/snowplow utils/0.16.8

[agnessnowplow]

Description

This release extends support for those users who would like to use the Snowplow incremental base macros but are using specific older versions of the AMP tracker or the Pixel tracker which do not send dvce_created / dvce_sent_tstamp fields. It also fixes a bug in the apply_grands() macro when the users does not have a grants config defined.

What type of PR is this? (check all applicable)

• [ ] 🍕 Feature
• [x] 🐛 Bug Fix
• [ ] 📝 Documentation Update
• [ ] 🎨 Style
• [ ] 🧑‍💻 Code Refactor
• [ ] 🔥 Performance Improvements
• [ ] ✅ Test
• [ ] 🤖 Build
• [ ] 🔁 CI
• [ ] 📦 Chore (Release)
• [ ] ⏩ Revert

Related Tickets & Documents

Checklist

• [ ] 💣 Is your change a breaking change?
• [ ] 📖 I have updated the CHANGELOG.md

Added tests?

• [ ] 👍 yes
• [x] 🙅 no, because they aren't needed
• [ ] 🙋 no, because I need help

Added to documentation?

• [ ] 📓 internal package docs (ymls, macros, readme, if applicable)
• [x] 📕 I have raised a Snowplow documentation PR if applicable (Link here if required)
• [ ] 🙅 no documentation needed

Release Only Checklist

• [x] I have updated the version number in all relevant places
• [x] I have changed the release date in the CHANGELOG.md