add Install C++ Compiler for Python 2.7 script to CI

.github/Install-VCForPython27.ps1

@@ -0,0 +1,55 @@
+# Install Visual Studio for Python 2.7
+
+Function Update-ScriptPath {
+  $env:PATH = [Environment]::GetEnvironmentVariable('PATH', [EnvironmentVariableTarget]::Machine);
+}
+
+Function Install-FromMsi {
+  Param(
+    [Parameter(Mandatory)]
+    [string] $name,
+    [Parameter(Mandatory)]
+    [string] $url,
+    [Parameter()]
+    [switch] $noVerify = $false,
+    [Parameter()]
+    [string[]] $options = @()
+  )
+
+  $installerPath = Join-Path ([System.IO.Path]::GetTempPath()) ('{0}.msi' -f $name);
+
+  Write-Host ('Downloading {0} installer from {1} ..' -f $name, $url);
+  (New-Object System.Net.WebClient).DownloadFile($url, $installerPath);
+  Write-Host ('Downloaded {0} bytes' -f (Get-Item $installerPath).length);
+
+  $args = @('/i', $installerPath, '/quiet', '/qn');
+  $args += $options;
+
+  Write-Host ('Installing {0} ...' -f $name);
+  Write-Host ('msiexec {0}' -f ($args -Join ' '));
+
+  Start-Process msiexec -Wait -ArgumentList $args;
+
+  # Update path
+  Update-ScriptPath;
+
+  if (!$noVerify) {
+    Write-Host ('Verifying {0} install ...' -f $name);
+    $verifyCommand = (' {0} --version' -f $name);
+    Write-Host $verifyCommand;
+    Invoke-Expression $verifyCommand;
+  }
+
+  Write-Host ('Removing {0} installer ...' -f $name);
+  Remove-Item $installerPath -Force;
+
+  Write-Host ('{0} install complete.' -f $name);
+}
+# VCForPython27.msi on OneDrive 
+$vcForPythonUrl = 'https://onedrive.live.com/download?cid=E31C5E4C89FA0C0E&resid=E31C5E4C89FA0C0E%211131&authkey=ANXY9t9F3-KpKC0';
+
+# Alternatively from web.archive.org
+# https://web.archive.org/web/20200709160228if_/https://download.microsoft.com/download/7/9/6/796EF2E4-801B-4FC4-AB28-B59FBF6D907B/VCForPython27.msi
+# Source: https://web.archive.org/web/20190720195601/http://www.microsoft.com/en-us/download/confirmation.aspx?id=44266
+
+Install-FromMsi -Name 'VCForPython27' -Url $vcForPythonUrl -NoVerify;

.github/workflows/pythonpackage.yml

@@ -16,12 +16,14 @@ jobs:
             with:
               python-version: ${{ matrix.python-version }}
               architecture: 'x86'
+          - name: Install C++ Compiler for Python 2.7
+            run: .\.github\Install-VCForPython27.ps1
+            shell: powershell
           - name: Install dependencies
             run: |
               python -m pip install --upgrade pip
               pip install --upgrade setuptools
               pip install wheel
-              pip install https://download.lfd.uci.edu/pythonlibs/w4tscw6k/cp27/regex-2020.1.8-cp27-cp27m-win32.whl
               pip install -U -r requirements-dev.txt
           - name: Lint with pylint
             run: |