Added github workflow

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  unit-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository with submodules
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Update submodules to the latest commit
+        run: git submodule update --remote --recursive
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.0'
+
+      - name: Install specific Ceedling version
+        run: gem install ceedling -v 0.31.1
+
+      - name: Install gcc-avr
+        run: sudo apt-get update && sudo apt-get install -y gcc-avr
+
+      - name: Run Ceedling tests
+        run: ceedling test:all

project.yml

@@ -32,6 +32,7 @@
 :paths:
   :test:
     - +:test/**
+    - -:test/support
   :source:
     - src/**
   :support:
@@ -54,7 +55,6 @@
   :mock_prefix: mock_
   :when_no_prototypes: :warn
   :enforce_strict_ordering: TRUE
-  :verbosity: 2
   :plugins:
     - :ignore
     - :array