- fix python version used for packaging to 3.8

- actually wait for python install to finish before trying to use it and update environment

Author: markwort

.github/workflows/release.yml

@@ -13,6 +13,10 @@ jobs:
 
       - name: Checkout code
         uses: actions/checkout@v2
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.8'
       - name: Build project # This would actually build your project, using zip for an example artifact
         run: |
           .\make.bat

src/install.ps1

@@ -1,5 +1,5 @@
 Write-Host "--- Installing Python runtime ---" -ForegroundColor blue
-.\python-install.exe /quiet InstallAllUsers=1 PrependPath=1 Include_test=0 Include_launcher=0
+Start-Process -FilePath .\python-install.exe -ArgumentList "/quiet InstallAllUsers=1 PrependPath=1 Include_test=0 Include_launcher=0" -NoNewWindow -Wait
 python.exe -m pip install --upgrade pip
 Write-Host "--- Python runtime installed ---`n" -ForegroundColor green