[2021] New question: package manager

[pitgrap]

First: Thank you for the survey, I'm following it at least since 2017 and really appreciate it.

So I just took a look at the 2020 results to check, what was the the most used package manager and realized, that there is not a question for it. It would be awesome, if you can add a question for package manager for 2021. A package manager is one of the most important tools in the workspace. With package manager I'm talking about npm, yarn, yarn2/berry, pnpm, rush. Another interesting question would be, if they are used in a multirepo/monorepo with workspace functionality.

If this question would be repeated every year we could see same nice changes and effects, for example like for react, vue, angular etc.