MNT Use GitHub Actions CI

.github/workflows/ci.yml

@@ -0,0 +1,16 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+  # Every Tuesday at 1:20pm UTC
+  schedule:
+    - cron: '20 13 * * 2'
+
+jobs:
+  ci:
+    name: CI
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && startsWith(github.repository, 'silverstripe/')) || (github.event_name != 'schedule')
+    uses: silverstripe/gha-ci/.github/workflows/ci.yml@v1

.github/workflows/keepalive.yml

@@ -0,0 +1,17 @@
+name: Keepalive
+
+on:
+  workflow_dispatch:
+  # The 4th of every month at 10:50am UTC
+  schedule:
+    - cron: '50 10 4 * *'
+
+jobs:
+  keepalive:
+    name: Keepalive
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && startsWith(github.repository, 'silverstripe/')) || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Keepalive
+        uses: silverstripe/gha-keepalive@v1

README.md

@@ -1,6 +1,6 @@
 ## SilverStripe CMS
 
-[![Build Status](https://api.travis-ci.com/silverstripe/silverstripe-cms.svg?branch=4)](https://travis-ci.com/silverstripe/silverstripe-cms)
+[![CI](https://github.com/silverstripe/silverstripe-cms/actions/workflows/ci.yml/badge.svg)](https://github.com/silverstripe/silverstripe-cms/actions/workflows/ci.yml)
 [![Latest Stable Version](https://poser.pugx.org/silverstripe/cms/version.svg)](http://www.silverstripe.org/stable-download/)
 [![Latest Unstable Version](https://poser.pugx.org/silverstripe/cms/v/unstable.svg)](https://packagist.org/packages/silverstripe/cms)
 [![codecov](https://codecov.io/gh/silverstripe/silverstripe-cms/branch/master/graph/badge.svg)](https://codecov.io/gh/silverstripe/silverstripe-cms)