chore: Upgrade pg and sequelize to support node 14+ (#1462)

* Upgrade pg and sequelize to support node 14+

When Node 14 came out the app was incompatible, we should always have a maximum version defined here until the server code has been tested to prove compatibility

Co-authored-by: Lance Whatley <whatl3y@gmail.com>

server/test/helper.js

@@ -28,5 +28,4 @@ function runMigrations() {
 runMigrations();
 
 // This is needed for the relative manual mock to be picked up
-// $FlowFixMe
 jest.mock("../events");

server/test/support.js

@@ -6,7 +6,9 @@ export function flushdb() {
   const sql = sequelize.getQueryInterface();
   const tables = Object.keys(sequelize.models).map((model) => {
     const n = sequelize.models[model].getTableName();
-    return sql.quoteTable(typeof n === "string" ? n : n.tableName);
+    return sql.queryGenerator.quoteTable(
+      typeof n === "string" ? n : n.tableName
+    );
   });
 
   const query = `TRUNCATE ${tables.join(", ")} CASCADE`;