fix: Updat edx-ui-toolkit node library.

edx-ui-toolkit 1.5.5 drops usage of the ux-pattern-library for its docs
and also updates many of its dependencies.  As a result, many
edx-platform dependencies that were super out of date can now be further
upgraded.

package.json

@@ -40,7 +40,7 @@
     "datatables": "1.10.18",
     "datatables.net-fixedcolumns": "3.2.6",
     "edx-proctoring-proctortrack": "git+https://git@github.com/anupdhabarde/edx-proctoring-proctortrack.git#f0fa9edbd16aa5af5a41ac309d2609e529ea8732",
-    "edx-ui-toolkit": "1.5.4",
+    "edx-ui-toolkit": "1.5.5",
     "exports-loader": "0.6.4",
     "file-loader": "^6.2.0",
     "font-awesome": "4.7.0",