fix(Segmentation): bump packages to fix segmentation rendering (#3138)

* add test mode

* bump packages

* add reference lines

* update yarn lock

* fix netlify build

* fix num workers

* update year in doc

modes/basic-test-mode/README.md

@@ -0,0 +1,5 @@
+# Test mode
+
+This mode is used to test the basic functionality of the OHIF viewer
+in a controlled environment. It is not intended to be used for
+development or production.