fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-JQUERY-567880
- https://snyk.io/vuln/SNYK-JS-JQUERY-565129
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-LODASHTEMPLATE-1088054
- https://snyk.io/vuln/SNYK-JS-URIJS-2440699
- https://snyk.io/vuln/SNYK-JS-JQUERY-174006
- https://snyk.io/vuln/SNYK-JS-URIJS-2441239
- https://snyk.io/vuln/SNYK-JS-URIJS-1319803
- https://snyk.io/vuln/SNYK-JS-URIJS-2401466
- https://snyk.io/vuln/SNYK-JS-URIJS-2415026
- https://snyk.io/vuln/SNYK-JS-URIJS-2419067
- https://snyk.io/vuln/SNYK-JS-URIJS-1319806
- https://snyk.io/vuln/SNYK-JS-URIJS-1055003
- https://snyk.io/vuln/npm:jquery:20150627
- https://snyk.io/vuln/SNYK-JS-URIJS-1078286

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": "1.1.6",
     "font-awesome": "4.7.0",