Div implements ClickNotifier with raw type

[stefanuebe]

It's currently

public class Div extends HtmlContainer implements ClickNotifier {

but should be

public class Div extends HtmlContainer implements ClickNotifier<Div> {

[ZheSun88]

in this case, should also check other HTML components:
Span is using the same https://github.com/vaadin/flow/blob/master/flow-html-components/src/main/java/com/vaadin/flow/component/html/Span.java#L30

Article: https://github.com/vaadin/flow/blob/master/flow-html-components/src/main/java/com/vaadin/flow/component/html/Article.java#L30

i didn't go through all of them... but need to check maybe all the others

[denis-anisimov]

Good catch.