Not working with Angular 6+

[iPazooki]

It seems it has dependancy to lower version of RXJS!

[chrisvelevitch]

Here is what npm is complaining about:-

npm ERR! peer dep missing: @angular/core@^4.0.0, required by ngx-countdown-timer@0.1.9
npm ERR! peer dep missing: rxjs@^5.1.0, required by ngx-countdown-timer@0.1.9
npm ERR! peer dep missing: zone.js@^0.8.4, required by ngx-countdown-timer@0.1.9

and we're running Angular 8.2, rxjs 6.5 and zone.js 0.9.1.