Chore: Upgrade to Angular v18

Chore: Upgrade to Python 3.12
Chore: Upgrade to psycopg3

bookie/src/app/cashier-report/cashier-report.resolver.spec.ts

@@ -0,0 +1,15 @@
+import { inject, TestBed } from '@angular/core/testing';
+
+import { CashierReportResolver } from './cashier-report-resolver.service';
+
+describe('CashierReportResolver', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [CashierReportResolver],
+    });
+  });
+
+  it('should be created', inject([CashierReportResolver], (service: CashierReportResolver) => {
+    expect(service).toBeTruthy();
+  }));
+});