GitHub Actions: initial commit

.github/workflows/ci.yml

@@ -0,0 +1,23 @@
+# https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: CI
+
+on:
+  push:
+    branches: [github-actions]
+  pull_request:
+    branches: [github-actions]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Gradle
+      run: ./gradlew build

.travis.yml

@@ -22,8 +22,9 @@ before_install:
 
 stages:
   - name: test
+    if: branch = disabled
   - name: snapshot
-    if: branch = master AND type IN (push) AND tag IS blank
+    if: branch = disabled AND type IN (push) AND tag IS blank
   - name: release
     if: type IN (push) AND tag IS present