Add latest Kotlin version (2.0)

The OJ includes only one version of Kotlin, which is 1.1.
Since version 1.1 a lot of stuff has been deprecated and so much has changed that the language does not feel the same anymore.
Many commonly available methods doesn’t even exist in 1.1.
Thus I hope that Kotlin will be updated to 2.0 (latest).

I think v2 came out recently. I will look into this. Thanks for the suggestion!

@hjr265 i saw that you have update Kotlin version to 1.4. However, from my IDE it says that this is a deprecated version of Kotlin. Maybe remove 1.4 and add both 1.9 and 2.0 (latest of v1 and v2)?
image

That’s the plan in sha Allah.

Although we will provide v1.9 first and then, later on, v2.

@touhidurrr You can give it a try now:

image

Thanks! It works!

Although for some reason my IDE is not showing deprecation warnings now.