re-add arduino tests

Author: ladyada

.github/workflows/githubci.yml

@@ -23,27 +23,26 @@ jobs:
     - name: lint
       run: ./pylint_check.sh
 
-#  build:
-#    strategy:
-#      fail-fast: false
-#      matrix:
-#        arduino-platform: ["uno", "cpx_ada", "pyportal"]
-#
-#    runs-on: ubuntu-latest
-#    
-#    steps:
-#    - uses: actions/setup-python@v1
-#      with:
-#        python-version: '3.x'
-#    - uses: actions/checkout@v2
-#    - uses: actions/checkout@v2
-#      with:
-#         repository: adafruit/ci-arduino
-#         path: ci
-#
-#    - name: pre-install
-#      run: bash ci/actions_install.sh
-#
-#    - name: test platforms
-#      run: python3 ci/build_platform.py ${{ matrix.arduino-platform }}
-#
+  arduino:
+    strategy:
+      fail-fast: false
+      matrix:
+        arduino-platform: ["uno", "cpx_ada", "pyportal"]
+
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/setup-python@v1
+      with:
+        python-version: '3.x'
+    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2
+      with:
+         repository: adafruit/ci-arduino
+         path: ci
+
+    - name: pre-install
+      run: bash ci/actions_install.sh
+
+    - name: test platforms
+      run: python3 ci/build_platform.py ${{ matrix.arduino-platform }}