Add GitHub Actions configuration

.github/workflows/permission_handler_plugin.yaml

+# This is a basic workflow to help you get started with Actions
+
+name: permission_handler
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the develop branch
+on:
+  push:
+    branches: [ master, develop ]
+  pull_request:
+    branches: [ master, develop ]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # Job configuration for the permission_handler_platform_interface (Platform Interface Package)
+  permission_handler_platform_interface:
+    # The type of runner that the job will run on
+    runs-on: macos-latest
+    env:
+      source-directory: ./permission_handler_platform_interface 
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      
+      # Make sure the stable version of Flutter is available
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'beta'
+
+      # Download all Flutter packages the permission_handler_platform_interface depends on
+      - name: Download dependencies
+        run: flutter pub get
+        working-directory: ${{env.source-directory}}
+
+      # Run Flutter Format to ensure formatting is valid
+      - name: Run Flutter Format
+        run: flutter format --set-exit-if-changed lib
+        working-directory: ${{env.source-directory}}
+      
+      # Run Flutter Analyzer
+      - name: Run Flutter Analyzer
+        run: flutter analyze
+        working-directory: ${{env.source-directory}}
+      
+      # Run all unit-tests with code coverage
+      - name: Run unit tests
+        run: flutter test --coverage
+        working-directory: ${{env.source-directory}}
+
+      # Upload code coverage information
+      - uses: codecov/codecov-action@v1
+        with:
+          file: ${{env.source-directory}}/coverage/lcov.info # optional
+          name: permission_handler_platform_interface (Platform Interface Package) # optional
+          fail_ci_if_error: true 
+
+  # Job configuration for the permission_handler (App Facing Package)
+  permission_handler:
+    # The type of runner that the job will run on
+    runs-on: macos-latest
+    env:
+      source-directory: ./permission_handler 
+      example-directory: ./permission_handler/example
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+      
+      # Make sure the stable version of Flutter is available
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'beta'
+
+      # Download all Flutter packages the permission_handler depends on
+      - name: Download dependencies
+        run: flutter pub get
+        working-directory: ${{env.source-directory}}
+
+      # Run Flutter Format to ensure formatting is valid
+      - name: Run Flutter Format
+        run: flutter format --set-exit-if-changed lib
+        working-directory: ${{env.source-directory}}
+      
+      # Run Flutter Analyzer
+      - name: Run Flutter Analyzer
+        run: flutter analyze
+        working-directory: ${{env.source-directory}}
+      
+      # Run all unit-tests with code coverage
+      - name: Run unit tests
+        run: flutter test --coverage
+        working-directory: ${{env.source-directory}}
+      
+      # Build Android version of the example app
+      - name: Run Android build
+        run: flutter build apk --release
+        working-directory: ${{env.example-directory}}
+   
+      # Build iOS version of the example app
+      - name: Run iOS build
+        run: flutter build ios --release --no-codesign
+        working-directory: ${{env.example-directory}}
+
+      # Upload code coverage information
+      - uses: codecov/codecov-action@v1
+        with:
+          file: ${{env.source-directory}}/coverage/lcov.info # optional
+          name: permission_handler (App Facing Package) # optional
+          fail_ci_if_error: true