this seems to switch execution context on Windows to Powershell when using "cmd" #303

When using open, even if you run node using cmd instead of powershell, the open function call changes the execution context to powershell, which is... not great? That should just stay cmd.

This is most obvious with some straight foward STR.

1. Create a file test.js and put the following code in it:

   import open from "open"; 
   open("https://github.com");
   await new Promise(resolve => setTimeout(resolve, 10000));

2. run cmd and cd to the folder with test.js
3. run node test.js.

The cmd title bar briefly changes to C:\Windows\System32\cmd.exe - node test.js, then changes to Windows Powershell. Something it really should not be doing. There aren't infinitely many windows-native command line interfaces, detecting that we're in cmd and using that instead of using powershell would be pretty reasonable, given that the code looks like it's already checking whether it's in WSL or not.