appveyor beta error

[Tony Brix]

Description

appveyor error on beta version

https://ci.appveyor.com/project/UziTech/git-menu/build/job/b6dtdqlg1e1tqydr

Using Atom version: & : The term 'C:\projects\git-menu\Atom Beta\atom.exe' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is 
correct and try again.
At line:55 char:18
+     $atomVer = & "$script:ATOM_EXE_PATH" --version | Out-String
+                  ~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (C:\projects\git-menu\Atom Beta\atom.exe:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException

Steps to Reproduce

1. run build-package.ps1 on appveyor with ATOM_CHANNEL=beta

Expected behavior:

succeeds

Actual behavior:

fails

Reproduces how often:

100%

Versions

v1.40.0-beta0