Support experimental OpenEndRang<T>

[benkeil]

When I use the new open end ranges

import my.package.extensions.rangeUntil

(nextRuntime ..< LocalDate.now())

ktfmt removes the import because it thinks it is unused.

[deepkrg17]

Also ktfmt gives error when I use rangeUntil operator.

error: Expecting an element

[ZacSweers]

I think the right title for this may be to support the rangeUntil operator

[benkeil]

There are more problems with not yet stable features like ContextReceivers.

[ZacSweers]

This will be stable in Kotlin 1.9.0, which is currently in beta

[sureshg]

Kotlin 1.9.0 is already released with stable ..< operator for open-ended ranges . Are there any plans to support 1.9.x soon?

[hick209]

Closed with #433

Should be available on the next release