File extension of TypeScript launch script adjusted on Windows

[petervdonovan]

In this branch, the tests pass for me locally for TypeScript on Windows.

[petervdonovan]

It looks like only the Docker tests are failing now.

[lhstrh]

While not using the script may be a reasonable workaround, I think it makes the test less complete, and exposes us to problems like the failing Docker tests. @Depetrol had suggested that the issue was that the script didn't have a .ps1 extension, which seems simple to fix.

[Depetrol]

The reason why typescript tests are failing seems to be powershell in windows-latest image only being able to run scripts ending with .bat or .ps1 file extensions. An alternative fix(which I'll push to this branch) is to change the generated script in bin to end with .bat extension(to align with other targets) and modify the run command to run the .bat script.

[petervdonovan]

The reason why typescript tests are failing seems to be powershell in windows-latest image only being able to run scripts ending with .bat or .ps1 file extensions. An alternative fix(which I'll push to this branch) is to change the generated script in bin to end with .bat extension(to align with other targets) and modify the run command to run the .bat script.

Awesome, thanks Shulu!