Bump pg from 7.18.1 to 7.18.2

Bumps [pg](https://github.com/brianc/node-postgres) from 7.18.1 to 7.18.2.
- [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/pg@7.18.1...pg@7.18.2)

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

package.json

@@ -77,7 +77,7 @@
     "node-sass": "^4.13.1",
     "node-uuid": "^1.4.8",
     "passwords": "^1.3.1",
-    "pg": "^7.18.1",
+    "pg": "^7.18.2",
     "redis": "^3.0.2",
     "sequelize": "^5.21.3",
     "smooth-scroll": "^16.1.2",