chore(release): publish [skip ci]

- @ohif/extension-cornerstone@0.50.5
 - @ohif/extension-dicom-html@0.50.4
 - @ohif/extension-vtk@0.50.7
 - @ohif/ui@0.50.4
 - @ohif/viewer@0.50.20

platform/ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ohif/ui",
-  "version": "0.50.3",
+  "version": "0.50.4",
   "description": "A set of React components for Medical Imaging Viewers",
   "author": "OHIF Contributors",
   "license": "MIT",