Enable GitHub Actions (#5)

* Update the platformio.ini

Defaulting the platform to the latest public release, fixing versions for dependencies

* Create Actions Workflow

This creates a default workflow that builds both the AVR and ESP8266 code using the default configuration options.

.github/workflows/main.yml

@@ -0,0 +1,21 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install Python Wheel
+      run: pip install wheel
+    - name: Install PlatformIO Core
+      run: pip install -U https://github.com/platformio/platformio/archive/v4.2.1.zip
+    - name: Compile BaseStation (AVR)
+      run: python -m platformio run
+      working-directory: DCCpp_Uno
+    - name: Compile BaseStation (ESP8266)
+      run: python -m platformio run
+      working-directory: DCCpp_ESP

DCCpp_ESP/platformio.ini

@@ -10,16 +10,18 @@
 
 
 [env:esp8266]
-platform=https://github.com/platformio/platform-espressif8266.git#feature/stage
+platform=espressif8266
 board=d1_mini
 framework=arduino
 lib_deps=
   ESP8266WiFi
   ESP8266mDNS
   ArduinoOTA
-  ESPAsyncTCP@1.1.1
-  ESPAsyncWebServer
-  ArduinoJson
+  ESPAsyncTCP
+  ESP Async WebServer
+  ArduinoJson@5.13.4
   TaskScheduler
   Hash
   SPIFFS
+lib_compat_mode=strict
+lib_ldf_mode=chain+