Is it really necessary to add support for `Solaris` operating system?

https://github.com/joshiayush/argparse/blob/a99c1d1f1361a5133559cd2ab80e61ec6cb974d6/src/main/java/Argparse/OsUtils.java#L92-L97

I think adding support for **Solaris** is a bit out-of-scope for me as a developer right now, because I don't have experience using **Solaris**. I can add support for **Mac** although that's another operating system that I didn't use but it's a bit similar to **Linux** which is my primary operating system. And because of the platform independence of `Java` project `argparse` will have no issue on **Windows**. But adding support for **Solaris** is a bit weird right now. Either remove the function completely or add support for **Solaris** too.