Removed the use of any and enabled the rule in eslint.

Now according to me the conversion is final.
Testing is required.

overlord/src/app/purchase/purchase-dialog.component.spec.ts

@@ -7,11 +7,13 @@ describe('PurchaseDialogComponent', () => {
   let component: PurchaseDialogComponent;
   let fixture: ComponentFixture<PurchaseDialogComponent>;
 
-  beforeEach(waitForAsync(() => {
-    TestBed.configureTestingModule({
-      declarations: [MatDialogModule, PurchaseDialogComponent],
-    }).compileComponents();
-  }));
+  beforeEach(
+    waitForAsync(() => {
+      TestBed.configureTestingModule({
+        declarations: [MatDialogModule, PurchaseDialogComponent],
+      }).compileComponents();
+    }),
+  );
 
   beforeEach(() => {
     fixture = TestBed.createComponent(PurchaseDialogComponent);

overlord/src/app/purchase/purchase-dialog.component.ts

@@ -6,6 +6,7 @@ import { round } from 'mathjs';
 import { Observable, of as observableOf } from 'rxjs';
 import { debounceTime, distinctUntilChanged, map, startWith, switchMap } from 'rxjs/operators';
 
+import { Inventory } from '../core/inventory';
 import { Product } from '../core/product';
 import { ProductService } from '../product/product.service';
 import { MathService } from '../shared/math.service';
@@ -22,7 +23,7 @@ export class PurchaseDialogComponent implements OnInit {
 
   constructor(
     public dialogRef: MatDialogRef<PurchaseDialogComponent>,
-    @Inject(MAT_DIALOG_DATA) public data: any,
+    @Inject(MAT_DIALOG_DATA) public data: { inventory: Inventory },
     private fb: FormBuilder,
     private math: MathService,
     private productSer: ProductService,

overlord/src/app/purchase/purchase.component.spec.ts

@@ -9,12 +9,14 @@ describe('PurchaseComponent', () => {
   let component: PurchaseComponent;
   let fixture: ComponentFixture<PurchaseComponent>;
 
-  beforeEach(waitForAsync(() => {
-    TestBed.configureTestingModule({
-      imports: [MatDialogModule, ReactiveFormsModule, RouterTestingModule],
-      declarations: [PurchaseComponent],
-    }).compileComponents();
-  }));
+  beforeEach(
+    waitForAsync(() => {
+      TestBed.configureTestingModule({
+        imports: [MatDialogModule, ReactiveFormsModule, RouterTestingModule],
+        declarations: [PurchaseComponent],
+      }).compileComponents();
+    }),
+  );
 
   beforeEach(() => {
     fixture = TestBed.createComponent(PurchaseComponent);

overlord/src/app/purchase/purchase.component.ts

@@ -11,6 +11,7 @@ import { debounceTime, distinctUntilChanged, map, startWith, switchMap } from 'r
 
 import { AuthService } from '../auth/auth.service';
 import { Account } from '../core/account';
+import { AccountBalance } from '../core/account-balance';
 import { AccountService } from '../core/account.service';
 import { DbFile } from '../core/db-file';
 import { Inventory } from '../core/inventory';
@@ -42,7 +43,7 @@ export class PurchaseComponent implements OnInit, AfterViewInit, OnDestroy {
   form: FormGroup;
   voucher: Voucher = new Voucher();
   product: Product | null = null;
-  accBal: any;
+  accBal: AccountBalance | null = null;
 
   displayedColumns = ['product', 'quantity', 'rate', 'tax', 'discount', 'amount', 'action'];