Update test workflow to run firmware tests in native environment and add ArduinoJson dependency to platformio.ini

Author: speedy4all

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Run firmware tests
         working-directory: ./firmware
         run: |
-          pio test
+          pio test -e native
 
   test-react-native:
     runs-on: ubuntu-latest

firmware/platformio.ini

@@ -8,6 +8,7 @@ lib_deps =
   fastled/FastLED@^3.6.0
   h2zero/NimBLE-Arduino@^1.4.3
   olikraus/U8g2@^2.35.8
+  bblanchon/ArduinoJson@^6.21.3
 
 [env:native]
 platform = native
@@ -17,4 +18,5 @@ lib_deps =
   h2zero/NimBLE-Arduino@^1.4.3
   olikraus/U8g2@^2.35.8
   throwtheswitch/Unity@^2.5.2
+  bblanchon/ArduinoJson@^6.21.3
 build_flags = -DUNITY_INCLUDE_DOUBLE -DUNITY_DOUBLE_PRECISION=1e-12