feat(buttons): Fixed disabled buttons module tests (#1604)
feat(buttons): Fixed disabled buttons module tests (#1604)

* added fakeAsync and tick calls to force change detection work in tests

* fixed karma config

* enabled code coverage

* chore(build): fixed karma config (#1606)

* added fakeAsync and tick calls to force change detection work in tests

Le0Michine/ng2-bootstrap,valor-software/ngx-bootstrap,IlyaSurmay/ngx-bootstrap-versioning,valor-software/ng2-bootstrap,valor-software/ng2-bootstrap,valor-software/ngx-bootstrap,valor-software/ngx-bootstrap,erodriguezh/ngx-bootstrap,valor-software/ngx-bootstrap,Le0Michine/ng2-bootstrap,IlyaSurmay/ngx-bootstrap-versioning