Bump pg from 7.14.0 to 7.17.0

Bumps [pg](https://github.com/brianc/node-postgres) from 7.14.0 to 7.17.0.
- [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@7.17.0)

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

package.json

@@ -27,7 +27,7 @@
     "mocha": "^6.2.2",
     "morgan": "^1.9.1",
     "nyc": "^15.0.0",
-    "pg": "^7.14.0",
+    "pg": "^7.17.0",
     "pg-hstore": "^2.3.3",
     "uuid": "^3.3.3"
   },