updated gh workflow

Author: Renaud11232

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
     needs: build
     strategy:
       matrix:
-        python: ["2.7", "3.8"]
+        python: ["2.7", "3.9"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -53,9 +53,9 @@ jobs:
           python-version: ${{ matrix.python }}
       - name: Download arduino-cli
         run: |
-          wget https://github.com/arduino/arduino-cli/releases/download/0.26.0/arduino-cli_0.26.0_Linux_64bit.tar.gz
-          tar xzf arduino-cli_0.26.0_Linux_64bit.tar.gz
-          rm arduino-cli_0.26.0_Linux_64bit.tar.gz
+          wget https://github.com/arduino/arduino-cli/releases/download/0.29.0/arduino-cli_0.29.0_Linux_64bit.tar.gz
+          tar xzf arduino-cli_0.29.0_Linux_64bit.tar.gz
+          rm arduino-cli_0.29.0_Linux_64bit.tar.gz
       - name: Install test dependencies
         run: |
           pip install pytest