Add GitHub action with tests

Author: michallaskowski

.github/workflows/continuous-integration-workflow.yml

@@ -0,0 +1,35 @@
+name: Run tests
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  android_tests:
+    name: Android tests
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Tests
+        run: bash ./gradlew mokttp:testDebugUnitTest
+
+  ios_tests:
+    name: iOS Tests
+    runs-on:  macOS-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Select Xcode 11.4
+        run: sudo xcode-select -s /Applications/Xcode_11.4.app
+      - name: Boot simulator
+        run: xcrun simctl boot "iPhone 8"
+      - name: Tests
+        run: ./gradlew mokttp:iosTest