Fix Windows Installer Bug When No Arguments Presented & Add Testing T…

…o Ensure No Regressions (#1975)

Fixes: #1928 

It seems that in certain situations whitespace is getting passed into
the script and messing up the Rover install command. This fixes that by
filtering out whitespace if it gets passed in.

installers/binstall/scripts/windows/install.ps1

@@ -48,7 +48,11 @@ function Download($version) {
 }
 
 function Invoke-Installer($tmp, $rover_install_args) {
-  & "$exe" "install" "$rover_install_args"
+  if (![string]::IsNullOrWhiteSpace($rover_install_args)) {
+    & "$exe" "install" "$rover_install_args"
+  } else {
+    & "$exe" "install"
+  }
   Remove-Item "$tmp" -Recurse -Force
 }