Prettied, Linted and updated angular.json according to the latest schematic of Angular CLI.

Now all that is needed is to make it ready for strict compiling.
Removed eslint-plugin-prettier as it is not recommended and causes errors for both eslint and prettier

Bumped to v8.0.0

overlord/src/app/core/journal.ts

@@ -0,0 +1,14 @@
+import { Account } from './account';
+import { CostCentre } from './cost-centre';
+
+export class Journal {
+  id: string;
+  debit: number;
+  amount: number;
+  account: Account;
+  costCentre: CostCentre;
+
+  public constructor(init?: Partial<Journal>) {
+    Object.assign(this, init);
+  }
+}