message: Safari now supports Service Workers
  Versions 11.1 for desktop and 11.3 for iOS now support Service Workers as per Verified locally with Xcode Simulator and desktop running 10.13.4.
diff: @@ -59,7 +59,7 @@ const browserPredicates: {
  'Mobile Safari': {
  es2015: since(10),
  push: since(9, 2),
  - serviceworker: () => false,
  + serviceworker: since(11, 3),
  modules: since(10, 3),
  },
  'Safari': {
  @@ -70,8 +70,7 @@ const browserPredicates: {
  // caniuse.com.
  versionAtLeast([10, 11], parseVersion(ua.getOS().version));
  },
  - // https://webkit.org/status/#specification-service-workers
  - serviceworker: () => false,
  + serviceworker: since(11, 1),
  modules: since(10, 1),
  },
  'Edge': {
  