Added Windows prebuilds for Node 16 LTS

[miroslavpokorny]

Description

Builded windows prebuilds for node.js 16 using command in prebuilds/README.md

Motivation and Context

Node 16 is active LTS starting from 26th October 2021.
With prebuilds it is not necessary to install c++ build tools on target machine.

How Has This Been Tested?

Newly created prebuild for windows copyed to node_modules/zookeeper/prebuilds directory on machine without c++ build tools. Application using zookeeper module started without error.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have read the code of conduct.
• I have read the contributing guide.
• I have updated the documentation accordingly (if applicable).

[DavidVujic]

Thank you @miroslavpokorny!

I will review this as soon as possible.

[DavidVujic]

Hello again @miroslavpokorny!

I will create a separate pull request for this, including binaries for Mac OS X.

As a maintainer I will create new binaries for security reasons. But I have added you as a co-author and will of course also add your name to the changelog. I hope it is okay doing this way!

Thank you again for making a pull request, much appreciated!

[DavidVujic]

Here's the Co-authored-by commit: 049ccd8

And the changelog: https://github.com/yfinkelstein/node-zookeeper/blob/master/CHANGELOG.md#v-500-2021-12-06