Lamp v3.1.7

• Support for Kotlin's default arguments 🎉 (they must use @Optional)
• @DefaultFor now accepts a ~ for parent paths
• Removed @Optional#def()
• @Optional is now allowed on primitive types, in which case they will use the default primitive value (zero for numbers, false for booleans, etc.)

Full Changelog: 3.1.6...3.1.7