(Kotlin) kts is not recognized

[AlexCzar]

Describe the issue
hljs.getLanguage("kts") cannot find Kotlin language.

Which language seems to have the issue?
Kotlin

Are you using highlight or highlightAuto?

highlight

Sample Code to Reproduce

hljs.getLanguage("kt"); // works
hljs.getLanguage("kotlin"); // works
hljs.getLanguage("kts"); // doesn't work

example:
https://jsfiddle.net/tao605qL/55/

Expected behavior
hljs.getLanguage("kts"); should return "Kotlin" language.

[joshgoebel]

PR welcome.

[AlexCzar]

Thanks. If I knew tests were not required, I would've submitted the PR myself :D

[joshgoebel]

We don't require tests for adding a single new alias.