feat: angular 7+ update (#1910)

Closes #1890

BREAKING CHANGES:
Angular 7+ now required.
The following libraries were updated:
- @agm/core
- @ng-bootstrap/ng-bootstrap
- @swimlane/ngx-charts
- ng2-ckeditor
- ngx-echarts

src/app/@theme/components/layout-direction-switcher/layout-direction-switcher.component.ts

@@ -1,6 +1,6 @@
 import { Component, OnDestroy, Input } from '@angular/core';
 import { NbLayoutDirectionService, NbLayoutDirection } from '@nebular/theme';
-import { takeWhile } from 'rxjs/operators/takeWhile';
+import { takeWhile } from 'rxjs/operators';
 
 @Component({
   selector: 'ngx-layout-direction-switcher',

src/app/@theme/layouts/one-column/one-column.layout.ts

@@ -1,6 +1,6 @@
 import { Component, OnDestroy } from '@angular/core';
 import { NbThemeService } from '@nebular/theme';
-import { takeWhile } from 'rxjs/operators/takeWhile';
+import { takeWhile } from 'rxjs/operators';
 
 // TODO: move layouts into the framework
 @Component({

src/app/@theme/layouts/three-columns/three-columns.layout.ts

@@ -1,6 +1,6 @@
 import { Component, OnDestroy } from '@angular/core';
 import { NbThemeService } from '@nebular/theme';
-import { takeWhile } from 'rxjs/operators/takeWhile';
+import { takeWhile } from 'rxjs/operators';
 
 // TODO: move layouts into the framework
 @Component({

src/app/@theme/layouts/two-columns/two-columns.layout.ts

@@ -1,6 +1,6 @@
 import { Component, OnDestroy } from '@angular/core';
 import { NbThemeService } from '@nebular/theme';
-import { takeWhile } from 'rxjs/operators/takeWhile';
+import { takeWhile } from 'rxjs/operators';
 
 // TODO: move layouts into the framework
 @Component({

src/app/pages/dashboard/dashboard.component.ts

@@ -1,6 +1,6 @@
 import {Component, OnDestroy} from '@angular/core';
 import { NbThemeService } from '@nebular/theme';
-import { takeWhile } from 'rxjs/operators/takeWhile' ;
+import { takeWhile } from 'rxjs/operators' ;
 
 interface CardSettings {
   title: string;

src/app/pages/dashboard/temperature/temperature-dragger/temperature-dragger.component.ts

@@ -22,7 +22,7 @@ export class TemperatureDraggerComponent implements AfterViewInit, OnChanges {
   @Input() maxLeap = 0.4;
 
   value = 50;
-  @Output('valueChange') valueChange = new EventEmitter<Number>();
+  @Output() valueChange = new EventEmitter<Number>();
   @Input('value') set setValue(value) {
     this.value = value;
   }

src/app/pages/e-commerce/country-orders/map/country-orders-map.service.ts

@@ -1,6 +1,6 @@
 import { Injectable } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
-import { Observable } from 'rxjs/Observable';
+import { Observable } from 'rxjs';
 
 
 @Injectable()

src/app/pages/e-commerce/earning-card/front-side/earning-card-front.component.ts

@@ -1,9 +1,8 @@
 import { Component, Input, OnDestroy, OnInit } from '@angular/core';
 import { NbThemeService } from '@nebular/theme';
-import { interval } from 'rxjs';
+import { interval , Subscription } from 'rxjs';
 import { switchMap, takeWhile } from 'rxjs/operators';
 import { EarningService, LiveUpdateChart } from '../../../../@core/data/earning.service';
-import { Subscription } from 'rxjs/Subscription';
 
 @Component({
   selector: 'ngx-earning-card-front',

src/app/pages/maps/bubble/bubble-map.component.ts

@@ -2,8 +2,8 @@ import { Component, OnDestroy } from '@angular/core';
 import { HttpClient } from '@angular/common/http';
 import { combineLatest } from 'rxjs';
 import { takeWhile } from 'rxjs/operators';
-import { NgxEchartsService } from 'ngx-echarts';
 import { NbThemeService } from '@nebular/theme';
+import { registerMap } from 'echarts';
 
 @Component({
   selector: 'ngx-bubble-map',
@@ -31,8 +31,7 @@ export class BubbleMapComponent implements OnDestroy {
   private alive = true;
 
   constructor(private theme: NbThemeService,
-              private http: HttpClient,
-              private es: NgxEchartsService) {
+              private http: HttpClient) {
 
     combineLatest([
       this.http.get('assets/map/world.json'),
@@ -41,7 +40,7 @@ export class BubbleMapComponent implements OnDestroy {
       .pipe(takeWhile(() => this.alive))
       .subscribe(([map, config]: [any, any]) => {
 
-        this.es.registerMap('world', map);
+        registerMap('world', map);
 
         const colors = config.variables;
         this.bubbleTheme = config.variables.bubbleMap;

src/app/pages/maps/search-map/search/search.component.ts

@@ -1,7 +1,7 @@
 import { Component, ElementRef, EventEmitter, NgZone, OnInit, Output, ViewChild } from '@angular/core';
 import { MapsAPILoader } from '@agm/core';
 import { Location } from '../entity/Location';
-import {} from 'googlemaps';
+
 
 @Component({
   selector: 'ngx-search',

src/tsconfig.app.json

@@ -4,7 +4,6 @@
     "outDir": "../out-tsc/app",
     "module": "es2015",
     "baseUrl": "./",
-    "types": [],
     "paths": {
       "@angular/*": [
         "../node_modules/@angular/*"