Quiet lint warnings in tests

I have no idea why the NgRx code is mutating the Array prototype
in the first place, but let's leave that there for now.

Author: markerikson

src/entities/sorted_state_adapter.test.ts

@@ -13,6 +13,7 @@ describe('Sorted State Adapter', () => {
   let state: EntityState<BookModel>
 
   beforeAll(() => {
+    //eslint-disable-next-line
     Object.defineProperty(Array.prototype, 'unwantedField', {
       enumerable: true,
       configurable: true,

src/entities/unsorted_state_adapter.test.ts

@@ -12,6 +12,7 @@ describe('Unsorted State Adapter', () => {
   let state: EntityState<BookModel>
 
   beforeAll(() => {
+    //eslint-disable-next-line
     Object.defineProperty(Array.prototype, 'unwantedField', {
       enumerable: true,
       configurable: true,