chore(package): update pg to version 8.0.2

Closes #44

Author: greenkeeper[bot]

package.json

@@ -64,7 +64,7 @@
     "eslint-plugin-react": "^7.14.3",
     "mocha": "^6.1.4",
     "nyc": "^14.1.1",
-    "pg": "^7.12.1",
+    "pg": "^8.0.2",
     "pg-hstore": "^2.3.3",
     "pgpass": "^1.0.2",
     "sinon": "^7.3.2",