build.ps1/appveyor.yml Install older cmake using chocolatey

Upgrade build.ps1 to use older version of cmake to see if that solves build issues.

appveyor.yml

@@ -1,12 +1,16 @@
 image: Visual Studio 2017
 
-version: 69.0.0-CI{build}
+version: 71.0.0-CI{build}
 
 shallow_clone: true
 
 # Start builds on tags only (GitHub and BitBucket)
 skip_non_tags: true
 
+#Cholatey install specific cmake
+install:
+  - cinst cmake.portable --version 3.12.1
+
 # to run your custom scripts instead of automatic MSBuild
 build_script:
   - ps: .\build.ps1

build.ps1

@@ -14,7 +14,7 @@ param(
 	[string] $CefBinaryDir = "../cefsource/chromium/src/cef/binary_distrib/",
 
 	[Parameter(Position = 3)]
-	$CefVersion = "3.3538.1852.gcb937fc",
+	$CefVersion = "3.3578.1860.g36610bd",
 
 	[ValidateSet("tar.bz2","zip","7z")]
 	[Parameter()]
@@ -324,7 +324,8 @@ try
 			rm CMakeCache.txt -ErrorAction:SilentlyContinue
 			rm -r CMakeFiles -ErrorAction:SilentlyContinue
 			Write-Diagnostic "Running cmake"
-			cmake -LAH -G "$CmakeGenerator$CmakeArch" -DUSE_SANDBOX=Off -DCEF_RUNTIME_LIBRARY_FLAG=/MD
+			&"$($env:ChocolateyInstall)\bin\cmake.exe" --version
+			&"$($env:ChocolateyInstall)\bin\cmake.exe" -LAH -G "$CmakeGenerator$CmakeArch" -DUSE_SANDBOX=Off -DCEF_RUNTIME_LIBRARY_FLAG=/MD .
 			popd
 			$env:CEFSHARP_BUILD_IS_BOOTSTRAPPED = "$Toolchain$Platform"
 		}