Update dependencies to platform version master-20210630170020

[danielpeach]

Event

{
  "branchName": "master",
  "createTag": false,
  "dependencyUpdates": [
    {
      "depName": "echo",
      "depVersion": "2.18.0-20210625170020"
    },
    {
      "depName": "kork",
      "depVersion": "7.110.0"
    }
  ],
  "hasDependencyUpdates": true,
  "newGradleProperties": "spinnakerRelease=master-20210630170020\norg.gradle.parallel=true\n\nspinnakerGradleVersion=8.6.0\npf4jVersion=3.2.0\nkorkVersion=7.110.0\nechoVersion=2.18.0-20210625170020\nkotlinVersion=1.3.72",
  "orgName": "spinnaker-plugin-examples",
  "platformVersion": "master-20210630170020",
  "repoId": "MDEwOlJlcG9zaXRvcnkyNzYzODM1MTE=",
  "repoName": "notificationPlugin"
}