refactor(lib): replace rxjs imports with a consistent form

Author: gund

projects/ngx-element-boundary/src/lib/cross-boundary-ng-element-strategy.ts

@@ -1,8 +1,6 @@
 import { ComponentRef, Injector } from '@angular/core';
 import { NgElementStrategy, NgElementStrategyFactory } from '@angular/elements';
-import { Subject } from 'rxjs';
-import { take, takeUntil } from 'rxjs/operators';
-
+import { Subject, take, takeUntil } from 'rxjs';
 import {
   ElementBoundaryNgElementStrategy,
   ElementBoundaryNgElementStrategyFactory,

projects/ngx-element-boundary/src/lib/element-boundary.service.ts

@@ -1,12 +1,13 @@
 import { Injectable, Optional } from '@angular/core';
-import { Observable, of } from 'rxjs';
 import {
+  Observable,
+  of,
   debounceTime,
   filter,
   map,
   shareReplay,
   timeout,
-} from 'rxjs/operators';
+} from 'rxjs';
 
 import { BoundarySharingStrategy } from './boundary-sharing-strategy/boundary-sharing-strategy';
 import { ComponentSelectorStrategy } from './component-selector-strategy/component-selector-strategy';

projects/ngx-element-boundary/src/lib/util.ts

@@ -1,5 +1,4 @@
-import { ReplaySubject, Observable, ObservedValueOf } from 'rxjs';
-import { switchAll } from 'rxjs/operators';
+import { ReplaySubject, Observable, ObservedValueOf, switchAll } from 'rxjs';
 
 /** @internal */
 export function isDefined<T>(value: T): value is NonNullable<T> {