Migrate to github actions

.github/workflows/main.yml

@@ -0,0 +1,45 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  format:
+    name: Format
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install OTP and Elixir
+        uses: actions/setup-elixir@v1.2.0
+        with:
+          otp-version: 22.1
+          elixir-version: 1.6.6
+      - name: Install dependencies
+        run: mix deps.get --only test
+      - name: Check mix format
+        run: mix format --check-formatted
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    services:
+      redis:
+        image: redis:5.0
+        ports:
+          - 6379:6379
+        options: --entrypoint redis-server
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install OTP and Elixir
+        uses: actions/setup-elixir@v1.2.0
+        with:
+          otp-version: 22.1
+          elixir-version: 1.6.6
+      - name: Install dependencies
+        run: |
+          mix deps.get --only test
+          mix deps.compile
+      - name: Run tests
+        run: mix test
+        env:
+          REDIS_HOST: redis
+          REDIS_PORT: ${{ job.services.redis.ports[6379] }}

README.md

@@ -1,6 +1,6 @@
 # Flume
 
-[![CircleCI](https://circleci.com/gh/scripbox/flume.svg?style=svg)](https://circleci.com/gh/scripbox/flume)
+![Test](https://github.com/scripbox/flume/workflows/CI/badge.svg?branch=master&event=push)
 
 Flume is a job processing system backed by [GenStage](https://github.com/elixir-lang/gen_stage) & [Redis](https://redis.io/)