message: update deps on new sftp package to match current
diff: },
  "dependencies": {
  "@cardstack/di": "0.12.7",
  - "@cardstack/files": "0.12.18",
  - "@cardstack/hub": "0.12.18",
  - "@cardstack/jsonapi": "0.12.18",
  + "@cardstack/files": "0.12.21",
  + "@cardstack/hub": "0.12.21",
  + "@cardstack/jsonapi": "0.12.20",
  "@cardstack/logger": "^0.1.0",
  "@cardstack/plugin-utils": "0.12.7",
  - "@cardstack/test-support": "0.12.18",
  + "@cardstack/test-support": "0.12.21",
  "ember-cli-babel": "^6.6.0",
  "lodash": "^4.17.11",
  "mime-types": "^2.1.21",
  