chore(release): publish [skip ci]

- @ohif/extension-vtk@0.52.18
 - @ohif/core@1.5.1
 - @ohif/viewer@1.12.1

platform/viewer/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ohif/viewer",
-  "version": "1.12.0",
+  "version": "1.12.1",
   "description": "OHIF Viewer",
   "author": "OHIF Contributors",
   "license": "MIT",
@@ -45,12 +45,12 @@
   },
   "dependencies": {
     "@babel/runtime": "^7.5.5",
-    "@ohif/core": "^1.5.0",
+    "@ohif/core": "^1.5.1",
     "@ohif/extension-cornerstone": "^2.0.0",
     "@ohif/extension-dicom-html": "^1.0.0",
     "@ohif/extension-dicom-microscopy": "^0.50.6",
     "@ohif/extension-dicom-pdf": "^1.0.0",
-    "@ohif/extension-vtk": "^0.52.17",
+    "@ohif/extension-vtk": "^0.52.18",
     "@ohif/i18n": "^0.51.0",
     "@ohif/ui": "^0.56.0",
     "@tanem/react-nprogress": "^1.1.25",