:tada: Constraint Layout 1.0.0

[KeithYokoma]

• It's stable now!!
• Full release note: https://sites.google.com/a/android.com/tools/recent/constraintlayout10isnowavailable

[konifar]

Congratulations to release ConstraintLayout stable version 🎂 Thank you for quick work! I guess you may get "dual-sword" extra skill.

[konifar]

LGTM! Hope CI success 🙏