Angular 9 with Ng Bootstrap library integration

Version Info

Angular CLI: 9.0.2
Node: 12.16.0

Angular: 9.0.1
... animations, common, compiler, compiler-cli, core, forms
... language-service, localize, platform-browser
... platform-browser-dynamic, router
Ivy Workspace: Yes

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.900.2
@angular-devkit/build-angular     0.900.2
@angular-devkit/build-optimizer   0.900.2
@angular-devkit/build-webpack     0.900.2
@angular-devkit/core              9.0.2
@angular-devkit/schematics        9.0.2
@angular/cli                      9.0.2
@ngtools/webpack                  9.0.2
@schematics/angular               9.0.2
@schematics/update                0.900.2
rxjs                              6.5.4
typescript                        3.7.5
webpack                           4.41.2