CI: Bump VM Image Versions in Azure

[lithomas1]

Mirroring some changes we made in the other repo.

Not bumping windows since we are redistributing some dlls from Visual Studio 2017, and it might be risky to upgrade Visual Studio.
See below

[lithomas1]

I think we can probably bump windows for 1.4, since the rc will probably catch the errors(if any exist).

[lithomas1]

cc @simonjayhawkins

[simonjayhawkins]

since the rc will probably catch the errors(if any exist).

The nightly builds are from master, so issues should be caught before the rc.

[lithomas1]

@simonjayhawkins Greenish.
IIUC, as long as the DLL version and the compiler toolchain version match, we should be fine.

[simonjayhawkins]

@lithomas1 i've restarted the failing job to be sure. Also reopened #135 to check current build status.

if both green will merge this and then rereun #135.

Should we maybe add something to the other section of 1.3.1 just in case there are issues so that users can more easily troubleshoot?

I assume this is a low-risk change. if not should we wait till finished with 1.3.x before merging?

[simonjayhawkins]

if both green will merge this and then rereun #135.

both green.

[jreback]

i guess need to revert this for the 1.3.x patch release builds