fix(ts-typings): make LC hooks on Copoment required - cause they are …

…always on Base class

- also add missing `is`

src/ts-typings/api.d.ts

@@ -26,19 +26,20 @@ export class Component<Props> extends HTMLElement {
   // this is not possible yet? ... without this we have to duplicate props definition with class props definition
   // [K in keyof Props]: Props[K],
 
+  static readonly is: string;
   static readonly props: ComponentProps<any, any>;
   static readonly observedAttributes: string[];
 
   // Custom Elements v1
   connectedCallback(): void;
   disconnectedCallback(): void;
   attributeChangedCallback(name: string, oldValue: null | string, newValue: null | string): void;
-  adoptedCallback?(): void;
+  adoptedCallback(): void;
 
   // SkateJS life cycle
   updatedCallback(previousProps: { [nameOrSymbol: string]: any }): boolean | void;
   // NOTE: infering generics work only on instances, not on implementation type. So this will not give you type safety, you still have to manually annotate those props in your code
-  renderCallback(props?:Props): VDOMElement<any> | VDOMElement<any>[] | null;
+  renderCallback(props?: Props): VDOMElement<any> | VDOMElement<any>[] | null;
   renderedCallback(): void;
 
   // SkateJS DEPRECATED