message: fix((core-test-kit): correct package.json repository field
diff: "publishConfig": {
  "access": "public"
  },
  - "repository": "https://github.com/wix/stylable/tree/master/packages/optimizer",
  + "repository": "https://github.com/wix/stylable/tree/master/packages/core-test-kit",
  "homepage": "https://stylable.io",
  "author": "Wix.com",
  "license": "MIT"
  