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/purchase-entries/purchase-entries.ts

@@ -1,15 +1,4 @@
-export class PurchaseEntriesItem {
-  id: string;
-  date: string;
-  supplier: string;
-  url: string[];
-  product: string;
-  quantity: number;
-  rate: number;
-  tax: number;
-  discount: number;
-  amount: number;
-}
+import { PurchaseEntriesItem } from './purchase-entries-item';
 
 export class PurchaseEntries {
   startDate: string;