Bump pg from 8.3.0 to 8.5.1 (#16)

Bumps [pg](https://github.com/brianc/node-postgres) from 8.3.0 to 8.5.1.
- [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/pg@8.3.0...pg@8.5.1)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -25,7 +25,7 @@
     "hubot-scripts": "^2.17.2",
     "hubot-slack": "^4.8.0",
     "moment": "^2.27.0",
-    "pg": "^8.3.0",
+    "pg": "^8.5.1",
     "twit": "^2.2.4",
     "xml2js": "^0.4.16"
   },