Migrate to GitHub Actions (#90)

* Migrate to GitHub Actions

* check only for master branch

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+on:
+  push:
+    branches:
+    - master
+  pull_request:
+    branches:
+    - master
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [8, 11]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup java
+      uses: actions/setup-java@v1
+      with:
+        java-version: ${{ matrix.java }}
+    - name: Execute test
+      uses: eskatos/gradle-command-action@v1
+      with:
+        arguments: build integrationTest

README.md

@@ -1,7 +1,7 @@
 Decaton
 =======
 
-[![Build Status](https://travis-ci.com/line/decaton.svg?branch=master)](https://travis-ci.com/line/decaton)
+[![Build Status](https://github.com/line/decaton/workflows/CI/badge.svg?branch=master)](https://github.com/line/decaton/actions?query=workflow%3ACI+branch%3Amaster+event%3Apush)
 
 Decaton is a streaming task processing framework built on top of [Apache Kafka](https://kafka.apache.org/).
 It is designed to enable "concurrent processing of records consumed from one partition" which isn't possible in many Kafka consumer frameworks.