Bump @angular/common, @angular/forms, @angular/platform-browser, @angular/platform-browser-dynamic, @angular/router and @ng-bootstrap/ng-bootstrap in /Open-ILS/src/eg2

Bump @angular/common, @angular/forms, @angular/platform-browser, @angular/platform-browser-dynamic, @angular/router and @ng-bootstrap/ng-bootstrap in /Open-ILS/src/eg2 #257