Bug#1038744: Update Kotlin to 1.3.40 or higher to enable reflection for Jitsi

[Timothy Pearson]

Package: kotlin
Version: 1.3.31

When attempting to package Jitsi for Debian, I ran into a blocking issue due to Kotlin 1.3.31 not providing the typeOf() reflection function, which was introduced as experimental in Kotlin 1.3.40.  Since the lift to move from one minor version to another is probably less than the lift needed to rewrite Jitsi's reflection code through its entire codebase, it would be useful to upgrade Kotlin to at least 1.3.40 in the Debian archives.