use github actions

.github/workflows/build.yml

@@ -0,0 +1,17 @@
+name: Java CI
+
+on: [push]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+            - name: Set up JDK 11
+              uses: actions/setup-java@v2
+              with:
+                  java-version: "11"
+                  distribution: "adopt"
+            - name: Build with Maven
+              run: mvn --batch-mode --update-snapshots verify

.travis.yml

@@ -1,3 +0,0 @@
-language: java
-jdk:
-  - openjdk8