Update CC SDK to v1.4.0

[erademacher]

This is a group of four commits that are probably best reviewed separately:

1. SDK Update
2. Update connection_string data source to match new API format
3. Remove an unnecessary unknown value check for API key
4. Changelog

After this is approved, I'm going to tag v1.0 🎉

Commit checklist

• [x] Changelog
• [x] Doc gen (make generate)
• [x] Integration test(s)
• [x] Acceptance test(s)
• [x] Example(s)

[erademacher]

TFTR!!