Merge pull request #529 from ember-cli-deploy/ci-badge

Update CI badge in README and use volta in CI

.github/workflows/ci.yaml

@@ -28,9 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2
-      with:
-        node-version: 12.x
+    - uses: volta-cli/action@v1
     - name: install dependencies
       run: npm install --no-package-lock
     - name: test

README.md

@@ -1,5 +1,6 @@
 # Ember CLI Deploy
-[![Build Status](https://travis-ci.org/ember-cli-deploy/ember-cli-deploy.svg?branch=master)](https://travis-ci.org/ember-cli-deploy/ember-cli-deploy) [![Code Climate](https://codeclimate.com/github/ember-cli-deploy/ember-cli-deploy/badges/gpa.svg)](https://codeclimate.com/github/ember-cli-deploy/ember-cli-deploy)
+[![Build Status](https://github.com/ember-cli-deploy/ember-cli-deploy/actions/workflows/ci.yaml/badge.svg
+)](https://github.com/ember-cli-deploy/ember-cli-deploy/actions/workflows/ci.yaml) [![Code Climate](https://codeclimate.com/github/ember-cli-deploy/ember-cli-deploy/badges/gpa.svg)](https://codeclimate.com/github/ember-cli-deploy/ember-cli-deploy)
 
 Simple, flexible deployment for your Ember CLI app