(maint) Update build config

Author: pauby

.appveyor.yml

@@ -2,7 +2,7 @@
 
 version: '{build}'
 max_jobs: 1
-#image: WMF 5
+image: Visual Studio 2019
 # History plugin requires complete log
 #clone_depth: 5
 branches:
@@ -56,6 +56,7 @@ init:
 install:
 - ps: 'Get-CimInstance win32_operatingsystem -Property Caption, OSArchitecture, Version | fl Caption, OSArchitecture, Version'
 - ps: $PSVersionTable
+- ps: choco upgrade chocolatey -y --no-progress
 - git --version
 - choco --version
 - ps: |