CI: update azure VM image

[TomAugspurger]

Email from Azure support

On March 23, 2020, we’ll be removing the following Azure Pipelines hosted images:

• Windows Server 2012R2 with Visual Studio 2015, a.k.a vs2015-win2012r2
• macOS X High Sierra 10.13, a.k.a macOS-10.13
• Windows Server Core 1803, a.k.a win1803

If you use YAML pipelines, update your pipeline by editing its YAML file.

jobs:

- job: Windows

  pool:

    vmImage: 'vs2017-win2016'

  steps:

  - script: echo hello from Windows

[ShaharNaveh]

Is there anything we need to change?

In the azure-pipelines file the value of vmImage is already 'vs2017-win2016'.

pandas/azure-pipelines.yml

Line 17 in 67a8016

vmImage: vs2017-win2016

(The most recent version of the file at the time of writing this)

---

or I am missing something (probably missing something)

[TomAugspurger]

I think the macOS image may be the problem, but I'm not sure.

pandas/azure-pipelines.yml

Lines 4 to 7 in 67a8016

	- template: ci/azure/posix.yml
	parameters:
	name: macOS
	vmImage: xcode9-macos10.13

That at least matches the 10.13 part.

[ShaharNaveh]

Ahh I see, (this is what I missed).

I'll open a PR addressing everything that's about to be removed.

[ShaharNaveh]

take