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/attendance/attendance-resolver.service.ts

@@ -1,8 +1,9 @@
 import { Injectable } from '@angular/core';
-import { ActivatedRouteSnapshot, Resolve, RouterStateSnapshot } from '@angular/router';
+import { ActivatedRouteSnapshot, Resolve } from '@angular/router';
 import { Observable } from 'rxjs/internal/Observable';
-import { AttendanceService } from './attendance.service';
+
 import { Attendance } from './attendance';
+import { AttendanceService } from './attendance.service';
 
 @Injectable({
   providedIn: 'root',
@@ -10,7 +11,7 @@ import { Attendance } from './attendance';
 export class AttendanceResolver implements Resolve<Attendance> {
   constructor(private ser: AttendanceService) {}
 
-  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<Attendance> {
+  resolve(route: ActivatedRouteSnapshot): Observable<Attendance> {
     const date = route.paramMap.get('date');
     return this.ser.get(date);
   }