Set up GitHub Actions

.github/workflows/build.yml

@@ -0,0 +1,24 @@
+name: Build
+
+on: pull_request
+
+jobs:
+  build:
+    name: Build project
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          distribution: adopt
+          java-version: 11
+
+        # Builds the release artifacts of the library
+      - name: Build
+        run: ./gradlew assemble
+
+        # Generates other artifacts (javadocJar is optional)
+      - name: Source jar and dokka
+        run: ./gradlew androidSourcesJar javadocJar