build(deps): bump pg from 7.14.0 to 7.15.1 in /Server

Bumps [pg](https://github.com/brianc/node-postgres) from 7.14.0 to 7.15.1.
- [Release notes](https://github.com/brianc/node-postgres/releases)
- [Changelog](https://github.com/brianc/node-postgres/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brianc/node-postgres/compare/v7.14.0...pg@7.15.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Server/package-lock.json

@@ -2577,9 +2577,9 @@
       }
     },
     "pg": {
-      "version": "7.14.0",
-      "resolved": "https://registry.npmjs.org/pg/-/pg-7.14.0.tgz",
-      "integrity": "sha512-TLsdOWKFu44vHdejml4Uoo8h0EwCjdIj9Z9kpz7pA5i8iQxOTwVb1+Fy+X86kW5AXKxQpYpYDs4j/qPDbro/lg==",
+      "version": "7.15.1",
+      "resolved": "https://registry.npmjs.org/pg/-/pg-7.15.1.tgz",
+      "integrity": "sha512-o293Pxx5bNRpTv3Dh4+IIhPbTw19Bo4zvppLgR+MAV2I7AF3sMr9gPB4JPvBffWb24pDfC+7Ghe6xh2VxVMBpQ==",
       "requires": {
         "buffer-writer": "2.0.0",
         "packet-reader": "1.0.0",

Server/package.json

@@ -29,7 +29,7 @@
     "koa-static": "^5.0.0",
     "ksuid": "^1.2.0",
     "lru-cache": "^5.1.1",
-    "pg": "^7.14.0",
+    "pg": "^7.15.1",
     "pg-hstore": "^2.3.3",
     "pm2": "^4.1.2",
     "sequelize": "^5.21.2",