[kodablah]

That's because it's a point release. See 1.3-M1: https://github.com/JetBrains/kotlin/releases/tag/v1.3-M1 (blog https://blog.jetbrains.com/kotlin/2018/07/see-whats-coming-i...)

[repolfx]

That's true but JetBrains have been iterating the 1.2.x releases for a year now, and each one is like this - tons of bug fixes and small polishes. They add new IDE features but not new language features.

That said, the IDE plugin can still use some stability work.