chore(release): publish [skip ci]

- @ohif/extension-vtk@1.2.18
 - @ohif/core@2.4.1
 - @ohif/i18n@0.52.6
 - @ohif/ui@1.2.1
 - @ohif/viewer@3.6.2

platform/ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ohif/ui",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "A set of React components for Medical Imaging Viewers",
   "author": "OHIF Contributors",
   "license": "MIT",