title: Adding nuget feed into yaml for github actions
body: <p>I am trying to get my app to build using GitHub actions but its failing on a nuget feed from DevExpress. This is a feed to their free Xamarin forms mobile apps but am a bit unsure as to how I add this url into my xaml feed below.</p>
  <p><a href="https://nuget.devexpress.com/lfmw18a9ajn2doIsxhbxHxlNLaknLquc2XenroXfyrtctYYzdH/api" rel="nofollow noreferrer">https://nuget.devexpress.com/lfmw18a9ajn2doIsxhbxHxlNLaknLquc2XenroXfyrtctYYzdH/api</a></p>
  <p>Can someone point me in the right direction please.</p>
  <pre><code>name: CI on Push and Pull Request
  
  on: [push, pull_request]
  
  jobs:
    Practice:
      runs-on: macos-latest
      steps:
      - uses: actions/checkout@v1
      - name: Run a one-line script
        run: echo Hello, world!
      - name: Run a multi-line script
        run: |
          echo Add other actions to build,
          echo test, and deploy your project.
      - name: Show what's in the directory
        run: |
          ls
      - name: Show what all is in the parent directory
        run: |
          cd ..
          ls
          
    Android:
      runs-on: macos-latest
      steps:
      - uses: actions/checkout@v1
      - name: Android
        run: |
          nuget restore
          cd THEHOCKEYLAB.Android/
          msbuild THEHOCKEYLAB.Android.csproj /verbosity:normal /t:Rebuild /p:Configuration=Debug
          
    iOS:
      runs-on: macos-latest
      steps:
      - uses: actions/checkout@v1
      - name: iOS
        run: |
          nuget restore
          msbuild THEHOCKEYLAB.iOS.csproj /verbosity:normal /t:Rebuild /p:Platform=iPhoneSimulator /p:Configuration=Debug
  </code></pre>