Update dependency body-parser to ^1.20.3

Author: mend-for-github-com[bot]

package.json

@@ -9,7 +9,7 @@
   "author": "Mark Lewin",
   "license": "ISC",
   "dependencies": {
-    "body-parser": "^1.18.3",
+    "body-parser": "^1.20.3",
     "dotenv": "^6.1.0",
     "express": "^4.16.4",
     "nexmo": "^2.4.0"