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/purchase.component.html

@@ -49,7 +49,7 @@
           <mat-autocomplete
             #autoA="matAutocomplete"
             autoActiveFirstOption
-            [displayWith]="displayAccount"
+            [displayWith]="displayFn"
             (optionSelected)="accountSelected($event)"
           >
             <mat-option *ngFor="let account of accounts | async" [value]="account">{{
@@ -85,7 +85,7 @@
           <mat-autocomplete
             #autoP="matAutocomplete"
             autoActiveFirstOption
-            [displayWith]="displayProductName"
+            [displayWith]="displayFn"
             (optionSelected)="productSelected($event)"
           >
             <mat-option *ngFor="let product of products | async" [value]="product">{{
@@ -193,7 +193,6 @@
         <mat-label>Narration</mat-label>
         <textarea
           matInput
-          matTextareaAutosize
           matAutosizeMinRows="5"
           placeholder="Narration"
           formControlName="narration"
@@ -218,7 +217,7 @@
             multiple
             accept="image/*"
             style="display: none"
-            (change)="detectFiles($event)"
+            (change)="image.detectFiles($event, voucher)"
           />
         </div>
       </div>