message: feat(electron-update): Use update-electron-config task in electron build
  A recent PR added the update-electron-config grunt task. This PR puts it to use in the electron build pipeline.
diff: @@ -12,3 +12,11 @@ steps:
  enableCodeCoverage: false # Optional
  #workingDirectory: # Optional
  #testFiles: 'test/*.js' # Required when enableCodeCoverage == True
  +
  + - task: Grunt@0
  + displayName: grunt update-electron-config
  + inputs:
  + gruntFile: $(System.DefaultWorkingDirectory)/drop/electron/electron/Gruntfile.js
  + targets: update-electron-config
  + arguments: --extension-version=$(extension-version) --app-insights-instrumentation-key=$(app-insights-instrumentation-key) --electron-update-url=$(electron-update-url)
  + gruntCli: node_modules/grunt-cli/bin/grunt
  