Update dependencies for JavaScript sample app (#2)

The important update is to the `serialize-javascript` package,
which recently released version v2.1.1 to fix a security vulnerability
CVE-2019-16769 (https://github.com/advisories/GHSA-h9rv-jmmf-4pgx ),
in which regular expressions in the input JS were not properly serialized
in the resulting JSON. Since `serialize-javascript` is only used as part
of the build process to minify the web app's code (which we control),
this vulnerability shouldn't affect us, but in case it does, this PR exists.

### How tested?
Manually reloaded the sample app and verified that the basic functions work.

Closes #2

Javascript/sample-app/package-lock.json

@@ -16,9 +16,9 @@
       }
     },
     "@types/node": {
-      "version": "12.12.14",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.12.14.tgz",
-      "integrity": "sha512-u/SJDyXwuihpwjXy7hOOghagLEV1KdAST6syfnOk6QZAMzZuWZqXy5aYYZbh8Jdpd4escVFP0MvftHNDb9pruA=="
+      "version": "12.12.16",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-12.12.16.tgz",
+      "integrity": "sha512-vRuMyoOr5yfNf8QWxXegOjeyjpWJxFePzHzmBOIzDIzo+rSqF94RW0PkS6y4T2+VjAWLXHWrfbIJY3E3aS7lUw=="
     },
     "@types/uuid": {
       "version": "3.4.6",
@@ -217,9 +217,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-      "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.0.tgz",
+      "integrity": "sha512-gac8OEcQ2Li1dxIEWGZzsp2BitJxwkwcOm0zHAJLcPJaVvm58FRnk6RkuLRpU1EujipU2ZFODv2P9DLMfnV8mw==",
       "dev": true
     },
     "ajv": {
@@ -566,9 +566,9 @@
       "dev": true
     },
     "bluebird": {
-      "version": "3.7.1",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.1.tgz",
-      "integrity": "sha512-DdmyoGCleJnkbp3nkbxTLJ18rjDsE4yCggEwKNXkeV123sPNfOCYeDoeuOY+F2FrSjO1YXcTU+dsy96KMy+gcg==",
+      "version": "3.7.2",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+      "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==",
       "dev": true
     },
     "bn.js": {
@@ -3690,9 +3690,9 @@
       "dev": true
     },
     "serialize-javascript": {
-      "version": "1.9.1",
-      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.9.1.tgz",
-      "integrity": "sha512-0Vb/54WJ6k5v8sSWN09S0ora+Hnr+cX40r9F170nT+mSkaxltoE/7R3OrIdBSUv1OoiobH1QoWQbCnAO+e8J1A==",
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-2.1.2.tgz",
+      "integrity": "sha512-rs9OggEUF0V4jUSecXazOYsLfu7OGK2qIn3c7IPBiffz32XniEp/TX9Xmc9LQfK2nQ2QKHvZ2oygKUGU0lG4jQ==",
       "dev": true
     },
     "set-blocking": {
@@ -4061,9 +4061,9 @@
       "dev": true
     },
     "terser": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/terser/-/terser-4.4.0.tgz",
-      "integrity": "sha512-oDG16n2WKm27JO8h4y/w3iqBGAOSCtq7k8dRmrn4Wf9NouL0b2WpMHGChFGZq4nFAQy1FsNJrVQHfurXOSTmOA==",
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/terser/-/terser-4.4.2.tgz",
+      "integrity": "sha512-Uufrsvhj9O1ikwgITGsZ5EZS6qPokUOkCegS7fYOdGTv+OA90vndUbU6PEjr5ePqHfNUbGyMO7xyIZv2MhsALQ==",
       "dev": true,
       "requires": {
         "commander": "^2.20.0",
@@ -4080,16 +4080,16 @@
       }
     },
     "terser-webpack-plugin": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.4.1.tgz",
-      "integrity": "sha512-ZXmmfiwtCLfz8WKZyYUuuHf3dMYEjg8NrjHMb0JqHVHVOSkzp3cW2/XG1fP3tRhqEqSzMwzzRQGtAPbs4Cncxg==",
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/terser-webpack-plugin/-/terser-webpack-plugin-1.4.2.tgz",
+      "integrity": "sha512-fdEb91kR2l+BVgES77N/NTXWZlpX6vX+pYPjnX5grcDYBF2CMnzJiXX4NNlna4l04lvCW39lZ+O/jSvUhHH/ew==",
       "dev": true,
       "requires": {
         "cacache": "^12.0.2",
         "find-cache-dir": "^2.1.0",
         "is-wsl": "^1.1.0",
         "schema-utils": "^1.0.0",
-        "serialize-javascript": "^1.7.0",
+        "serialize-javascript": "^2.1.1",
         "source-map": "^0.6.1",
         "terser": "^4.1.2",
         "webpack-sources": "^1.4.0",
@@ -4208,9 +4208,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.7.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.2.tgz",
-      "integrity": "sha512-ml7V7JfiN2Xwvcer+XAf2csGO1bPBdRbFCkYBczNZggrBZ9c7G3riSUeJmqEU5uOtXNPMhE3n+R4FA/3YOAWOQ==",
+      "version": "3.7.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.7.3.tgz",
+      "integrity": "sha512-Mcr/Qk7hXqFBXMN7p7Lusj1ktCBydylfQM/FZCk5glCNQJrCUKPkMHdo9R0MTFWsC/4kPFvDS0fDPvukfCkFsw==",
       "dev": true
     },
     "union-value": {