CI:set Python to use latest 3.x version

Signed-off-by: Raluca Chis <[email protected]>

Author: Raluca Chis

azure-pipelines.yml

@@ -196,6 +196,10 @@ stages:
     - checkout: self
       fetchDepth: 1
       clean: true
+    - task: UsePythonVersion@0
+      inputs:
+        versionSpec: '3.x'
+        addToPath: true
     - script: |
           set -e
           brew install doxygen libusb libxml2 ncurses cdk libserialport