text in readme in wrong place

[mscdex]

• Node Version: n/a
• Platform: Windows
• Compiler: n/a
• Module: n/a

Under the "On Windows" installation section there is a blurb about macOS that should be moved back into the "On Mac OS X" installation section:

Note that OS X is just a flavour of Unix and so needs python, make, and C/C++. An easy way to obtain these is to install XCode from Apple, and then use it to install the command line tools (under Preferences -> Downloads).

[andrwsalcdo]

Can I take this one? new contributor.

[mscdex]

@andrwsalcdo Sure, go for it.